Explain your idea

I'd like a feature where you could search up a mineral vein based on its minerals.
I searched through the manual three times and I still haven't known if you can excavate mekanism osmium. (answer that if possible)

All veins should be listed, if not you might need to add them

All veins should be listed, if not you might need to add them

I know that part of the manual, but I search through all of the ore veins but I still don't trust myself
Also: How do you add ore veins?

Ore veins are just recipes, so you can use a datapack to add more.

how do I place the vein tho?
(i'm in creative and I don't see it's name)

also it is ok to add via kubejs?

how do I place the vein tho?
(i'm in creative and I don't see it's name)

The /ie mineral put command can be used to place veins in Creative. You'll need to go off of the resourcelocation and not the vein's 'name' as it is localized.

also it is ok to add via kubejs?

You can add veins via KubeJS, but seeing as how KubeJS has broken things with IE many times before, we do not recommend KubeJS. The recommendation is to use datapacks, of which a tutorial can be found here on the Minecraft Wiki.

I'll close this, since the question was answered.

Future discussion is better placed in our discord:
https://discord.com/invite/SnUp97WUrN