Change Preference Restrictions settings in Screen Time on Mac
Use Preference Restrictions settings to lock Screen Time settings.
To change these settings on your Mac, choose Apple menu > System Settings, then click Screen Time in the sidebar. (You may need to scroll down.) Click the Family Member pop-up menu on the right and choose a family member (if you’re using Family Sharing), click Content & Privacy, then click Preference Restrictions.
Open Screen Time settings for me
Allow changes to these settings on iOS or iPadOS devices:
Turn the options off to restrict these changes. If an option is turned off, the Screen Time passcode is required to make a change.
Open Privacy Settings
Open Privacy & Security settings. See Change Privacy & Security settings.