How To See Your Blocked List On Facebook
When you unblock someone, that blocked person will be able to see your posts on Facebook that you share with the public.

The person won’t automatically become your friend on Facebook. If you want to become friends with a person who you’ve unblocked, you’ll need to send them a friend request again.

To unblock someone:
1. Click (?) in the top right of any Facebook page
2. Click Privacy Shortcuts from the drop-down menu
3. Locate and click on ...see more privacy settings
4. Click blocking at the left column of the next page that appears and scroll down to the block users section
5. Click Unblock next to the name of the person you want to unblock.

https://www.belmadeng.com/2019/04/view-blocked-facebook-list-see-blocked-list-fb-unblock-friends.html