By following these steps, you should be able to resolve the issue and regain access to your Facebook account. If you're still having trouble, you can try reaching out to Facebook's support team directly.

If you’ve previously blocked a profile or Page, you can easily reverse this in your settings. Note that unblocking someone won't automatically make you friends again; you’ll need to send a new friend request if you want to reconnect. YouTube·Drew Tutorial

If you happen to come across their profile while they are blocked:

Unblock People on Facebook in Seconds (Mobile & PC Tutorial)

Forgiveness is a virtue, and digital forgiveness is just a few clicks away! Now that you know how to unblock someone on Facebook, you can manage your connections with confidence. Just remember: unblocking opens the door for them to see your public posts, so ensure you are ready for that level of interaction.