Could you add a blacklist for which biomes there is allowed to spawn?
This will help pack devs a lot

Yep, that is something planned for the future

Thats awesome to hear, do you have any eta on it?

Probably will come in the next update of the mod

Implemented a config to determine wether each BetterEnd should be enabled or not. also you can set the chance for generation, fog density and presence of caves in the biome. Coming in the next update

Does that only change your biomes?
My current issue is that I have both BetterEnd and BYG and even if I disable "End" in BYG config, BetterEnd is still spawning BYG end biomes

BetterEnd searches for every End biome it can find in the registry and wraps each one of them into a BetterEndBiome class, which stores also some infos about fog density, caves presence and generation chance. This means that if BYG is installed their biomes will be detected and you will find options for them in the generated betterendforge\biomes.json config (this will come in the next update). If you want you can make some test by building the mod .jar from the github project. Then place the .jar inside your mod folder

i made an build a can confirm it works