Sudden Data Usage on iPhone

My iPhone 13 mini with iOS 16.6 has suddenly been using up my data allowance.

I rarely come close to using it up every month, and cannot figure out what has changed.

My usage has been pretty much the same over many months. And most of my usage is on wifi.

I've already gone into the Cellular section of Settings and see what my biggest data hogs are. Again, my use of those apps has not changed in any meaningful way.

Any idea what is causing this? Could it be a problem with 16.6 that will be fixed with the next update?

Thanks for any and all help