Hi Easy NPC devs, i wanna to ask you.
Is there any way to create put the modified entity into minecraft summon command.
Ex: /summon easy_npc:templar

You can look at a NPC and press F3+i to get all of their current data with a /summon command like:
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/summon easy_npc:orc -15.50 70.00 9.50 {Brain: {memories: {}}, ModelData: {Position: {}, Pose: "DEFAULT", Visible: {}, Rotation: {}, DefaultPose: "STANDING"}, HurtByTimestamp: 0, Owner: [I; 940439953, -167562164, -1601161573, -1389718966], ForgeData: {}, Attributes: [{Base: 0.699999988079071d, Name: "minecraft:generic.movement_speed"}, {Base: 32.0d, Modifiers: [{Amount: -0.03237451325730065d, Operation: 1, UUID: [I; -357824034, 515588271, -1106256546, 1653757810], Name: "Random spawn bonus"}], Name: "minecraft:generic.follow_range"}], Invulnerable: 1b, FallFlying: 0b, ActionData: {ActionEventSet: {}, ActionPermissionLevel: 0}, EasyNPCVersion: 1, PortalCooldown: 0, AbsorptionAmount: 0.0f, DialogData: {DialogDataSet: [], Type: "NONE"}, FallDistance: 0.0f, CanUpdate: 1b, DeathTime: 0s, Aggressive: 0b, HandDropChances: [0.085f, 0.085f], PersistenceRequired: 0b, AngerTime: 0, Motion: [0.0d, 0.0d, 0.0d], Navigation: {Home: {X: -16, Y: 70, Z: 9}}, EntityAttribute: {CanFloat: 0b, IsPushable: 0b, CanBeLeashed: 0b, Freefall: 0b, PushEntities: 0b, CanCloseDoor: 0b, CanPassDoor: 0b, CanUseNetherPortal: 0b, CanOpenDoor: 0b, IsAttackable: 0b, LightLevel: 7}, Health: 20.0f, LeftHanded: 0b, Air: 300s, OnGround: 1b, Offers: {TradingType: "BASIC", BasicMaxUses: 64, BasicRewardedXP: 1, Recipes: {Recipes: [{maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:stone", Count: 1b}, sell: {id: "minecraft:grass_block", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:stone", Count: 3b}, sell: {id: "minecraft:grass_block", Count: 3b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:stone", Count: 2b}, sell: {id: "minecraft:grass_block", Count: 2b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}, {maxUses: 64, buyB: {id: "minecraft:air", Count: 1b}, buy: {id: "minecraft:air", Count: 1b}, sell: {id: "minecraft:air", Count: 1b}, xp: 1, uses: 0, priceMultiplier: 1.0f, specialPrice: 0, demand: 0, rewardExp: 1b}]}, ResetsEveryMin: 0, Inventory: {}}, ScaleY: 1.0f, Rotation: [85.81406f, 7.0945764f], ScaleX: 1.0f, HandItems: [{}, {}], SkinData: {SkinURL: "", SkinType: "DEFAULT", Skin: ""}, Variant: "DEFAULT", ArmorDropChances: [0.085f, 0.085f, 0.085f, 0.085f], Profession: "NONE", ScaleZ: 1.0f, ObjectiveData: {ObjectiveDataSet: [{Type: "LOOK_AT_PLAYER", Prio: 9}, {Type: "LOOK_AT_MOB", Prio: 10}, {Type: "LOOK_AT_RESET", Prio: 9}], HasObjectives: 1b}, Fire: -1s, ArmorItems: [{}, {}, {}, {}], CanPickUpLoot: 0b, HurtTime: 0s}
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However the command is too long to paste it directly into the game so you need to use .mcfunctions or something like this to be able to use it.
You can also shorten the data, because some of them are not needed for all NPCs like the trading data.

Alternative you can try the NPC Spawner see:
https://github.com/MarkusBordihn/BOs-Easy-NPC/wiki/Spawner

ok, do you know how to customize mob loot? If possible with script

Mob loot, is not implemented yet, see:
#111

You could work around this by using the On Dead action, see:
https://github.com/MarkusBordihn/BOs-Easy-NPC/wiki/Actions#basic-actions-

OHHH alright. TYSM

wait I ask you once more. in Epic Fight combining with Easy NPC how to make npc mob shoot using modded ranged weapon? And change weapon attack speed and damage too

Depends on the modded range weapon.
If this is just an normal item with a lot of Mixins, then it is not support like "MrCrayfish's Gun Mod".

If it's a real range weapon which is based on the crossbow or bow, it should work out of the box.
Could you please share an example what modded range weapon you are referring to.

These types of ranged weapon basically base on normal bow , crossbow and throwable items. NPCs should perform ranged attack once they wield those type of weapons

By default the NPC are not attacking, you need to define the corresponding objectives see:
https://github.com/MarkusBordihn/BOs-Easy-NPC/wiki/Objectives#attack-objectives-%EF%B8%8F

If modded weapons are not working with any of these options, please open a new issue report with the details about the mod and I'm happy to take a closer look.

By default the NPC are not attacking, you need to define the corresponding objectives see: https://github.com/MarkusBordihn/BOs-Easy-NPC/wiki/Objectives#attack-objectives-%EF%B8%8F

If modded weapons are not working with any of these options, please open a new issue report with the details about the mod and I'm happy to take a closer look.

ok now i'll find out soon cuz this mod combined with epic fight. It's somewhat delayed with other modded weapons. So is there any way to make npc attack each others? Cuz i try to enable attack mobs but they didn't attack