Kind of a niche data pack, but one I needed for a server I'm working on where each player resides in their own biome. To encourage trade among other players this data pack makes farming trees impossible outside of their native biomes. Even applies to giant mushrooms and giant fungus.

How it works:

1. Leaf blocks won't drop saplings unless the leaf block is destroyed in a biome where that tree would generate naturally
2. Mushroom blocks won't drop mushrooms unless the block is destroyed in a biome where giant mushrooms generate naturally.
3. Nylium will not be effected by bonemeal unless you are in the nether (can't generate fungus, roots, sprouts, etc.)