Game crashes on launch.

org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Constant modifier method getActualReachDistance(DLnet/minecraft/world/level/Level;Lnet/minecraft/world/entity/player/Player;)D in mixins.reach-entity-attributes.json:ItemMixin from mod reach_entity_attributes failed injection check, (0/4) succeeded. Scanned 1 target(s). Using refmap refmap.reach-entity-attributes.json

this is the specific error which only shows on the console. I AM using Sinytra Connector so if that is the issue, please let me know.

This isn't a trinkets crash, it's reach entity attributes.

Like i said in my original post, i am using Sinytra Connector. i think theres a clash between Trinkets and Curios just based on the fact that they do the same thing. i just need confirmation on if that is the case or not so i can re-evaluate my plans with my pack.

Trinkets and Curios have separate systems so they wouldn't clash on just the basis that they do the same thing. The error that you've shared is specifically from Reach Entity Attributes crashing. You should remove Reach Entity Attributes, or whichever mod is embedding it, and then re-test for confirmation.

Either way, this is a reach entity attributes crash and even if it was in trinkets, I can't provide support to sinytra connector