Why would any sane person on earth release Display entities and blocks only in Java so it obviously must have been a big mistake or a gigantic bug that Display entities and blocks are not in Bedrock edition yet.

Can you believe this John? No, so can't I!

If you have already forgotten what I'm writing about: Display entities are entities useful for map or data pack creators to display various things. There are Block Display, Item Display and Text Display, which are used to display blocks, items and texts respectively. They can only be created with the /summon or /execute summon command. 

So I expect that to be fixed ASAP