See -> If your Apple ID is greyed out in Settings
If your Apple ID is greyed out in Settings - Apple Support
⤵️
If you can't click your Apple ID
- Go to Settings, then tap Screen Time.
- Tap Content & Privacy Restrictions.
- If Content & Privacy Restrictions is turned on, scroll down to the Allow Changes section.
- Tap Account Changes, and set it to Allow. If asked, enter your Screen Time passcode.
If you can't click other options in Settings
- Go to Settings, then tap Screen Time.
- Tap Content & Privacy Restrictions.
- If Content & Privacy Restrictions is turned on, scroll down and check if any settings are set to Don't Allow.
- If so, tap the setting, then choose Allow. If asked, enter your Screen Time passcode.
or:
See -> Use parental controls on your child's iPhone, iPad and iPod touch
Use parental controls on your child's iPhone, iPad and iPod touch – Apple Support (UK)
- 👉 Check restrictions -> tap Settings -> Screen Time -> Content & Privacy -> scroll to Allow Changes.
or
If you have a MDM profile, you need to contact your company - IT department.