How to update admin status of logged users?

There are elements at the UI that change when user is an admin. As the profile data is loaded only at the sign in, there is no way to update the user admin status without a new sign in.

A cheap solution would be fetching the user profile once in a while, but I would prefer a more "realtime" approach. Maybe including user's "updatedAt" timestamp in the response headers and firing a GET profile from the client when it's changed?