By default, our platform does not offer the option to disable the editing of a user's first and last name. However, you can hide this information by going to Settings>Profiles. Under Profile Names, you can find the Display Name Fields area, where you can disable the first and last name fields. This will remove them from the front end of your site and prevent users from editing them.

 

To add, you have to set the Display Name Format to 'Username' to be able to disable the First and Last Name on your website.