This may be something Microsoft was legally compelled to add. Activision has added a new requirement to Call of Duty accounts that raises a lot more questions than answers. As reported by Dexerto, ...

Does Call of Duty: Black Ops 7 have cross-save? Yes, it does. When you play Black Ops 7, you're required to set up an Activision account, and it's this that allows you to access your progress on all ...

Changing your display name in Black Ops 6 is something you can do in one of two ways. This is useful for whose display name is something they set up years ago on Battle.net, or if they recently set up ...

To change your display name in Black Ops 6, tap on the Settings cog icon in the main menu. Select the second to last option, Account & Network. Tap the Activision Account box then Change Display Name ...