My iphone is frozen on update apple id setting on ios 13.5 please help me out

I think this your problem, a somewhat "new" known issue that Apple is actively working on? I can't guarantee a solution, but, see:

This document explains what is happening and claims a solution Getting a message to Update Apple ID Settings on iPhone, iPad, or Mac? https://appletoolbox.com/update-apple-id-settings-on-iphone-ipad-or-mac-after-changing-your-password/

See Update Apple ID settings iphone https://discussions.apple.com/thread/251180098

How Fix Update Apple ID Settings If It Won’t Go Away https://techzillo.com/update-apple-id-settings/

Updating Apple ID Settings https://discussions.apple.com/thread/251076026

Update Apple ID Settings On iPhone? What It Means & What ToDo! https://www.payetteforward.com/update-apple-id-settings-on-iphone-what-it-means-what-to-do/  

If you have a active VPN running it can cause your iPhone to freeze...try turning VPN off.

Glad I could help!

Glad I could help!