Settings app missing completely

My settings app/icon has disappeared from my iPhone 12 (iOS15.2)

Even when I use the search function, it doesn't show up, the app isn't hiding in a folder somewhere.

Updating phone to newest iOS 15.2 didn't resolve it.

When I try restore phone via Apple Music app, it says I need to turn off Find My first before it can restore, but to turn that off I need to be able to access Settings....

help!

K.