Missing part of Settings after update to 18.1.1

What is happening if you type those missing settings in the search bar in settings? Do they pop up? If so it could be that they have moved

If they don't pop up you want to force restart your iPhone to see if the issues are persisting

Press and quickly release the volume up button. Press and quickly release the volume down button. Press and hold the side button.When the Apple logo appears, release the side button.

Look in Settings -> Apps

That's where many of those settings can be found now.

Regards.

They are NOT missing. Open the Settings App. Scan all the way down to the bottom of the page and see Apps. Tap Apps and all your apps are now listed alphabetically, where you can look for the app you want to change settings to there.