This article explains how to change your name in Google Meet using a web browser, your Android device's settings, or the Gmail app for iOS.
How to Change Your Name on Google Meet
The quickest and easiest way to change your name in Google Meet is through a web browser. You can do this in any web browser you use.
Go to your account page on Google and sign in to your account if necessary.
Select Personal Info from the vertical menu on the left. If you are using a mobile browser, this is in a horizontal menu at the top of the page.