When a Facebook user sets a post to “Friends only” or a more restrictive custom setting, Facebook’s systems enforce that access control. There is no “backdoor” for non-friends to see that content without the user’s permission.
If you truly need to see a private Facebook post, the only reliable, 100% effective method is to . If the person denies the request, their privacy settings are working exactly as intended to protect their data. how to view private facebook posts without being friend
Any tool, website, or method claiming to let you do this is likely: When a Facebook user sets a post to