Answer
After 30 days have passed, your account and all of your information will be permanently erased, and you will be unable to retrieve it. According to Facebook’s Help Center, it may take up to 90 days for everything you’ve posted to be removed.
How To Permanently Delete Facebook Account
How To Delete Your Facebook Account Permanently
You may immediately and permanently delete your Facebook account in 2021, even if the social network does not want you to leave. The distinction between deactivating your account and deleting it is that you will no longer be able to access your stuff or information you’ve given on the site.
If you change your mind and decide to delete your account, Facebook states that you have 30 days to cancel it. It will take up to 90 days for Facebook to fully erase all associated with your account.
To permanently delete your account on Facebook, go to Facebook settings and then choose your personal information. Click Deactivation, and then Delete Account. After that, you must complete the deletion process for your account.
Your profile, pictures, comments, films, and everything else you’ve added will be erased. You won’t be able to retrieve anything you’ve put on there. You’ll no longer be able to use Facebook Messenger.
After you cancel your account, Facebook will keep it live for 30 days in the hopes that you will change your mind. However, all that should be left of your account 90 days later is activity logs kept by Facebook for its own purposes. (Check back in a few minutes to see if anything has changed.)
Yes, it may be followed, but only if a court in that jurisdiction issues a notice to Facebook Inc. demanding that they track the IP to provide as evidence in criminal or other legal cases against offenders, or for other legal purposes.