I loaded into my world with over 5 chunks missing and chunks in places that they weren't there before

My Minecraft world (not a Realm) corrupted and I have no idea why. Several chunks went missing and chunks from different areas have been moved to/replaced current missing chunks. There are also chunks that just reset any sort of building that had happened at all. Me along with 3 other people have spent hours on this world and I would like it back and need this bug fixed because there was no reason for the world's corruption. I'd like to add that it is the only world that I have on my Bedrock account so other worlds wouldn't interfere with storage and plus I have a lot of storage on my desktop so I still can't find any reasons why my world would corrupt. Additionally, the day prior to the day it corrupted (when I am posting them), my friend's inventory disappeared but just for one person. Mine was like that and sent be back to spawn but once I reloaded, I got everything back but my friend reloaded more than 10 times. ( I am unable to attach the world, it exceeds maximum size limit.