How do ore veins generate in particular biomes?

I find a nice veins-gen mod ion curseforge , trying to find some way to make ore viens generate in particular biomes.https://www.curseforge.com/minecraft/mc-mods/custom-ore-veins I made a datapack that was supposed to generate diamond blocks in the biomes that have both temperature and humidity over than 0.79.(basically, swamps and jungles), the ore vein was successfully generated, but in every place. What should I do?