Modifying structure generation biomes

i believe this skill might apply for other datapack stuff too.
ive successfully added a biome to a structure to spawn in (eg ive allowed snow villages to spawn in swamps*), however id like to prevent them from spawning in the "snow biomes"
thanks for your time besties <3
*didnt actually do this with snow villages, just using it as a substitute for the modded structure i did it with