iCloud User Guide
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Prevent apps from showing your name
In Settings on iCloud.com, you can see a list of the iOS, iPadOS, and macOS apps that let other users of those apps look you up by your Apple ID email address. Anyone who looks you up can also see your first and last name.
Note: In some locations, you can use a phone number instead of an email address as your Apple ID.
You can prevent any listed app from showing your name and email address to other users.
Note: Manage Apps That Can Look You Up only appears if you set up iCloud Drive on your iPhone, iPad, iPod touch, or Mac (OS X 10.10 or later).
In Settings on iCloud.com, click Manage Apps That Can Look You Up in the Advanced section.
To prevent an app from showing your name and email address to other users, deselect the app’s checkbox in the list.
If the Look Me Up By Email list is empty, you don’t have any iOS, iPadOS, or macOS apps that use the feature.