Facebook has a mandatory waiting period. If you unblock someone and then change your mind, you must wait 48 hours before you can block them again.
Android Apps Junction 0:39 Unblock a Facebook profile, Page, or nickname | Messenger Help ... Unblock a profile or Page on Facebook * Tap Menu in the top left of Facebook. * Scroll down and tap Settings & privacy, then tap S... Facebook How to Unblock Someone on Facebook: A Step-by-Step Guide for ... Dec 26, 2024 — how to unblock someone on the facebook app