Hi myleslee44,
Just to confirm, is this happening with other apps as well, or only Facebook? That information will help us plan how to proceed.
If you're unable to make those changes for apps, let's check if restrictions are enabled that may be causing that behavior. This link explains how to check that, and will guide you through that process: Use parental controls on your child's iPhone, iPad, and iPod touch
Allow changes to privacy settings
The privacy settings on your device give you control over which apps have access to information stored on your device or the hardware features. For example, you can allow a social-networking app to request access to use the camera, which allows you to take and upload pictures.
To allow changes to privacy settings:
1. Go to Settings and tap Screen Time.
2. Tap Content & Privacy Restrictions. If asked, enter your passcode.
3. Under Privacy, tap the setting that you want to change.
Here are the things you can restrict:
* Location Services: Lock the settings to allow apps and websites to use location
* Contacts: Prevent apps from accessing your Contacts
* Calendars: Prevent apps from accessing your Calendar
* Reminders: Prevent apps from accessing your Reminders
* Photos: Prevent apps from requesting access to your photos
* Share My Location: Lock the settings for location sharing in Messages and Find My Friends
* Bluetooth sharing: Prevent devices and apps from sharing data through Bluetooth
* Microphone: Prevent apps from requesting access to your microphone
* Speech Recognition: Prevent apps from accessing Speech Recognition or Dictation
* Apple Advertising: Prevent changes to advertising settings
* Allow Apps to Request to Track: Prevent tracking activity by apps that you've denied access to
* Media & Apple Music: Prevent apps from accessing your photos, videos, or music library
Thanks!