All of my iCloud Data is Gone

I was testing out iOS 17 Beta 5 with Advanced Data Protection turned on. I wanted to downgrade to iOS 16 for improved stability; however, once I downgraded all of my iCloud data was gone (~100GB) and about 10+ years of digital accumulation poof.

Yes, I'm on the correct iCloud account. Yes, I'm logged in. Yes, I've checked iCloud.com as well as my device. Yes, I went back to iOS 17 Beta 5 to see if my backup would show up but there is no data and no backup anywhere else. I was discussing with apple tech support for over an hour and they were unable to assist.

Just checking if anyone else might have suggestions on other things to try.