iPhone 15
Turning automatic synchronisation of apps and app content on or off
You can set your phone to automatically download apps and app content that you've downloaded on your other devices. To use this function, you need to activate your Apple ID on your phone.
Press Settings.
Press App Store.
Press the indicator next to "App Downloads" to turn the function on or off.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.