Please finally add more specific Biome Tags for compatibility

It would be really nice if more specific tags were added to the biome tags list to have tags that group all main/sub variants of a biome type together. Having more specific conditions in vanilla would help compatibility between add-ons and mods and reduce long-term maintenance. Examples for more specific tags include: A tag for each type of wooded forest and their sub biomes (a tag for birch, oak, dark oak ex), unique tags for plains biomes savannah biomes and meadows, a tag for old growth versions of biomes, ect. It would be really nice to not have to rely on a dependency for mob spawns between fan creations.