I have found a very weird item in the Minecraft PE 1.16.0.59 beta version. This item dosen't have a name, it is invisible when dropped on the floor on put in an item frame and falls under the "nature" category, as shown in the screenshot. I have found 2 of these such items and I have no clue what these are, or if they are supposed to be in the beta. The item highlighted with the outline in the screenshot is the one.

P.S: I have not used any texture packs or data packs or command blocks. What you are seeing is completely Vanilla Minecraft.