Despite the changes made to the generation of foliage in Swamps in the most recent snapshot, it is still not in parity with Bedrock Edition as huge mushrooms do not generate in the biome whereas they do in Bedrock.

Note: As of the recent changes to the Swamp biome in the newest snapshot, directly modifying generation within the biome, this parity issue is valid given that the generation of foliage was tweaked post Buzzy Bees.