BiomeTweaker Mod (1.19.2, 1.18.2) allows almost every aspect of a biome can be altered. This is done using scripts that BiomeTweaker interprets, inspired by MineTweaker.
BiomeTweaker is a tool that allows people to modify biomes. BiomeTweaker allows you to change such things as temperature, snow, rain, top and filler blocks, as well as temperature. You can also add or remove biomes. BiomeTweaker can be used for any purpose, including a modpack and a Let’s Play. BiomeTweaker allows you to modify virtually every aspect of any biome.