Shelf mushroom expansion ideas

The shelf mushroom is a new block that will be added in the new dappled forest drop. The drop is when writing this still in its experimental fase and shelf mushrooms can so far only spawn in the dappled forest. I would really like to see these mushrooms spawn in the birch forests as a throwback to the birch forest concept art from a few years ago. Shelf mushrooms should also be able to spawn on the sides of giant mushrooms on the mushroom islands. This gives the mushroom islands a nice needed update and makes the biome a little less boring and plain. The shelf mushroom also needs a giant version just like the brown and red mushrooms. You can get a giant shelf mushroom by bonemealing a large one. This will create a 3 by 2 shelf mushroom made out of shelf mushroom blocks. These shelf mushroom blocks will have the properties of a slime blocks but without the stickiness. These giant shelf mushrooms will only naturally spawn on the mushroom islands, perhaps on the sides of a new giant fallen hollowed tree trunk structure.