If I'm understanding correctly, your apps are not loading after updating the iOS. I will be happy to help..
Check out this article to see if it helps:
If you can’t download or update apps, or if apps get stuck
Cheers.
If you can’t download or update apps, or if apps get stuck
I had iphone 6s and I made backup to my pc then I connected my new iphone 8 and restore backup after its done i found that all apps is loading or waiting thats it although internet speed is fine i left it for few hours and the same .. thank yiu
after restore to my new iphone 8 all apps is loading or waiting on celler data or wifi