You can add or remove a social profile, such as Twitter (X), from your profile as long as you are logged in and have confirmed that you own your account.
Requirements:
Option 1: In the header, you can edit your socials by clicking on the pencil ✏️ icon to add your social profile as a copy/paste.
Option 2: Go down to the Top Sources section on a profile and click on the pencil ✏️ icon to edit social media profiles.