Screen Time: How to log out of an Apple ID account when Sign Out is unavailable

When trying to change the account or accounts associated with an iPhone, iPad, or Mac that has Screen Time enabled with a passcode (ostensibly for a child) you will find that the Sign Out option is grayed out. That’s true in System Preferences/Settings in macOS and individual apps, and in Settings account name

Sign Out and Settings Media & Purchases in iOS and iPadOS.

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