As the title says, make it possible to configure the biomes that the Digimon spawn in to make it easier for us to make compatibilities with world gen expansion mods like "Oh the Biomes We've Gone", "Terralith", "Biomes O' Plenty", ETC.

To make this easier to implement, making all the Digimon spawn files reference a list of all available game biomes under a type's category (Dragon, Beast, Plant, ETC) instead of manually giving each Digimon every valid spawn biome would allow you to make a config file that people could add and remove biomes from.
you could also make it so that each Digimon can individually ignore a spawn biome with a boolean variable that is dynamically assigned to each biome in the global type lists.

I know there are mods that do this, but I honestly don't know how difficult it actually is in practice, so perhaps this is a really long shot suggestion.

(this is a suggestion after like 2 seconds overlooking the code, I don't mean anything to come off as rude if it's already been implemented and just isn't available as a config)

Totally fair, will change the spawns to be per data type instead of per digimon, completely right that my code was silly.
But I dont think I will add a config for the biomes tho, feels a bit redudant when that can be changed through data packs.