Greetings swf58,
If you are unable to adjust your Settings, you may be using parental controls or your device could have a mobile device management profile.
Is your phone provided to you through an employer or school? If so, check out:
"iOS, iPadOS, macOS, and tvOS have a built-in framework that supports mobile device management (MDM). MDM lets you securely and wirelessly configure devices by sending profiles and commands to the device, whether they’re owned by the user or your organization. MDM capabilities include updating software and device settings, monitoring compliance with organizational policies, and remotely wiping or locking devices. Users can enroll their own devices in MDM, and organization-owned devices can be enrolled in MDM automatically using Apple School Manager or Apple Business Manager. If you’re using Apple Business Essentials, you can also use the device management that’s built right in." Intro to mobile device management profiles
The profile manager would need to allow you to make changes.
If using parental controls, check out:
- "Go to Settings and tap Screen Time.
- Tap Turn on Screen Time, then tap it again. Choose "This is My [Device]" or "This is My Child's [Device]."
- Tap Content & Privacy Restrictions. If asked, enter your passcode, then turn on Content & Privacy Restrictions." Use parental controls on your child's iPhone, iPad, and iPod touch
We hope this helps to resolve the issue.
Best wishes.