How to add ores into the end

I am trying to add my own Ender pearl ore, but for some whatever reason, I can't find the configs anywhere to say what biome it spawns in. So I tried restricting the biomes to only end biomes, it didn't work! I searched for well over 10 minutes, blowing up the islands, mining with maximum haste, x-ray, came across nothing!

I resorted to chatgpt but it told me nothing in value, and I think the only way to allow end specific ores is if you use the coding section with blocks, which I find super complicated since I have no knowledge of block coding.

I did find a tutorial on how to do it, but it had the ore dimension spawn config built into it and it was in an older version.

Please, someone help me!