To unblock a Facebook Page that you previously blocked from your personal account, follow these steps: How to Unblock a Page
Here are the step-by-step instructions (no post required): unblock a facebook page
After unblocking, you can then visit the page, like it, or follow it again. You don’t need to post anything to unblock a page. To unblock a Facebook Page that you previously
: If you are trying to unblock someone from a Business Page you manage, you must first switch into your Page's profile, then navigate to Settings > Privacy > Blocking to see the list of people blocked from your Page. you can then visit the page
Click your profile picture in the top right corner.