Sky Structures Add-on 1.19/1.18+/1.17+

Sky Structures mod adds only hovering structures in MCPE. They will be generated at high altitudes, which means it will not be easy to get to them. Each of them will have useful items that will either be well hidden or guarded by a bunch of monsters. The harder it is to get the bounty, the more valuable the items inside. More than 10 new structures will appear.

Balloons
Each balloon has blocks of ore

Rainbow Balloon
Two combat zones with mob spawners

An island with a giant tree
Extremely dangerous place with many monsters

Mushroom Hovering Island
Peaceful place with mushroom cows

Triple Island
Plants, wood, and a small house

Simple Island
Random loot for the player

Bee Island
For the sweet tooth

Witches Island
You can find potions and food