Mobs and items have disappeared

I continue to experience the same problem from issue MCPE-151625 on my XBOX One.  This issue was submitted on 1/10/2022.  It was linked to an existing issue, MCPE-144208, and then set to resolved but .... this issue is not resolved.  My world is corrupt and I'm still experiencing the same issue from MCPE-151625.  It's been 10 months. How can we fix this problem?

MCPE-151625 Issue:  Minecraft has been very buggy lately; I do not know if it is a problem with my world specifically or generally. I was playing the other day, and everything was fine, I saved the game as usual and turned the system off. The next day I came back in and all of the tropical fish in my aquarium and outside pond (which I had to transfer from a reef with buckets) had disappeared. My dog that I had named and tamed also was gone. I had a barn full of horses (including a skeleton horse) and donkeys, all of which were gone as well. Lastly, my armor stand with enchanted chain link armor and a looting 3 diamond sword were gone. This is very discouraging, as I put a lot of time and effort into building, creating, and finding those items and mobs. I really hope something can be done about this problem and I would be more than happy to provide my seed number.

Additionally, my world is not updating with the latest cliff and cave upgrades.