To bring back a Facebook post hidden by mistake, you can follow these simple steps. First, navigate to your profile and click on the three dots (…) or ellipsis below your cover photo. From the dropdown menu, select “Activity Log.” In your Activity Log, you’ll find a list of your past activity, including hidden posts. Locate the hidden post you want to unhide, and then click on the ellipsis (…) or dropdown menu next to it. Finally, select “Add to posts” from the options provided. Voila! Your hidden post will now be restored to its original visibility on your timeline and shared with the audience it was intended for.