Unable to turn off background app refresh on iPhone 14 pro max

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you

You may have Screen Time Restrictions set to ON.

Open Settings ➔ Screen Time ➔ Content & Privacy Restrictions ➔ Background App Activities: Set this to ALLOW

Axel F.

You are welcome. Glad that you were able to resolve the issue.

Axel F.