Legacy Contact
What if you can't see the contact in your settings but it shows up only in that you have one but no list or name in applied.apple.com? This is to remove and not add.
iPhone 12 Pro Max
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You may remove a Legacy Contact for your Apple ID as described in How to add a Legacy Contact for your Apple ID - Apple Support
Remove a Legacy Contact
You can remove someone as a Legacy Contact at any time in your Apple ID settings.
+ On your iPhone, iPad, or iPod touch, go to Settings > [your name] > Password & Security.
+ On your Mac, choose Apple menu > System Preferences, then click Apple ID and select Password & Security.
Under Legacy Contact settings, choose the contact’s name to see more options.
Tap or click Remove Contact to remove them as a Legacy Contact. They won’t receive a notification of your decision, but you won't appear in their Legacy Contact list if they have an Apple device that includes this setting. The access key they received when you added them will no longer work.