Thx for the reply, It is literally impossible to get the white willow sapling via breeding, i have grafted over 500 silver lime leaves polunated by silver birch leaves. And all this was in the correct biome (swamp). But the void Bothanic miner collector can get the leaves and the wood but doesn't gives saplings when grafted mined,....
The withering bee is fine, you can get it via breeding.
The problem with the wither bee is that unlike the draconic bee who has the same drop chance does drop chunks in overworld the wither queen doesn't drop her skull fragments not even 1 after 29 generations and i have 6 of those hives working in overworld and nether and even in the nether its not giving it.