You can also pay a Revolut user that's physically nearby. You'll both need to open the app and go to the Payments tab, then click the 'Person near me' icon on the right of the 'Search' bar. Once you're both on this screen (and have enabled the feature) you'll be able to see them as a possible payee. They can also request money from you this way.
Your phone number and full name are never visible to people nearby, and you'll stop being visible shortly after you exit the 'People Near Me' screen.