1.20: Sinking Sand , micro biome and naturally spawning set piece

In jungle biomes there could be a rare Mirco biome that contains sinking sand.Sinking sand would work the same as powdered snow , minus the freezing affect of course. This could be used additionally as an in game rare naturally spawning structure as-well that beneath the sinking sand could be loot within chests. This could be an opportunity to introduce bundles within said naturally spawning biomes containing goodies for the player.