change user name

Hello, we’re sorry for the inconvenience you’re facing. If you’d like to change your username, you can check if the username is available by visiting the following URL: https://support.rankmath.com/users/username/ and replacing username with the username you want. If the page returns an error, it means the username is available. In that case, you can open a ticket requesting our support team to change your username. If the page returns a profile page, it means the username is unavailable, and you’ll have to create a new one. If you have any questions or need further assistance, feel free to contact our dedicated support team. We’re available 24/7, 365 days a year.

Sources:
How to Change Your Username in Rank Math » Rank Math
Using Rank Math’s Local SEO Module » Rank Math
How to Use Brand Names on Your WooCommerce Store » Rank Math