Deleting apps
How to delete an app snd all information
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How to delete apps on your iPhone, iPad, and iPod touch - Apple Support
you can delete from the App Library by locating the app and tap/hold, select Delete App
or you can go to Settings > General > iPhone Storage > [app name] > Delete
If you still are unable to delete, check:
Settings > Screen Time > Content & Privacy Restrictions > iTunes & App Store Purchases > Deleting Apps
make sure that's set to 'Allow'