According to the Minecraft Wiki, if you grow an Oak or Birch Tree within 2 blocks of a flower, there's about a 5% chance of the tree generating a Bee Nest, which comes with between 1-3 bees. It doesn't appear Future MC has this feature yet; it'd be nice to have it, so it's a bit easier to farm bees without needing to make Bee Hives. Would also help others get them easier, especially when currently they only naturally generate in vanilla biomes.

You can change the biomes that bee nests generate in, and the tree thing uses a coremod so I might not add it this update.

I'll see if I can add it soon.