You can create a new user on your Mac computer to help you avoid issues related to having more than one person on the same profile.

Can You Create a Username for a Group on Facebook?. When Facebook first started allowing users to create usernames for their account, the action was limited to personal profiles and pages.

To create an account, choose Create a User on the PS4 or PS5 login page, or visit the website. If you have an existing PSN account, you can add that from the login screen on your console as well.