How to change MacBook Air name

Below is predicted upon the information in the user's Byline >> MacBook Air 13″, macOS 11.7

To change the name of your MacBook Air 13″ running macOS 11.7 (Big Sur), follow these steps:

Change your MacBook's name

1 Click the Apple () menu in the top-left corner of your screen.

2 Select System Preferences.

3 Click Sharing.

4 At the top of the Sharing window, find the field labelled Computer Name.

5 Click in the field and delete the existing name.

6 Type your preferred new name (for example, Peter's MacBook Air).

7 Close the Sharing window. Your new name is saved automatically.

Does this change your registered MacBook name?

It changes the computer's name used on:

•Your local network.

•AirDrop (in some circumstances).

•Find My and other Apple services (though updates may take a little time).

Important: If by "registered MacBook Air" you mean the device name associated with your Apple Account, changing the Computer Name is usually sufficient to update the displayed device name,

https://support.apple.com/en-al/guide/mac-help/mchlp2322/mac