Why can’t I delete apps from iPhone

If you can't delete an app and it's not a built-in app that can't be deleted, there may be a restriction set on deleting apps. On an iPhone or iPad, go to Settings > Screen Time > Content & Privacy Restrictions > iTunes & App Store Purchases > Deleting Apps.

See: Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support

Click on this link to learn how to remove apps from iPhone -->

Remove apps from iPhone - Apple Support

- Remove an app from the Home Screen: Touch and hold the app on the Home Screen, tap Remove App, then tap Remove from Home Screen to keep it in the App Library, or tap Delete App to delete it from iPhone.

- Delete an app from the App Library and Home Screen: Touch and hold the app in the App Library, tap Delete App, then tap Delete. (See Find your apps in the App Library.)

- Note: When you remove a built-in app from your Home Screen, you also remove any related user data and configuration files.

Not all apps can be deleted. Ref. Delete built-in Apple apps from your iPhone, iPad, or Apple Watch - Apple Support