Happened to my wife, a small business owner who works with a lot of moms in the area (e.g. she belongs to lots of "<neighborhood> Moms" groups). Plus we moved in the pandemic, and all her contact with friends is over Facebook, so she's basically been crying since she woke up this morning. Sounds like it might be a bug related to PHP max time.
Multiple threads on the issue
https://www.reddit.com/r/facebook/comments/o3faqm/too_bad_i_...
https://www.reddit.com/r/facebook/comments/o3gp8v/shoutout_t...
https://www.reddit.com/r/facebook/comments/o3ms26/looks_like...
https://www.reddit.com/r/facebook/comments/o3cums/a_good_fri...
https://www.reddit.com/r/facebook/comments/o3h9u8/whats_goin...
https://www.reddit.com/r/facebook/comments/o3kol7/my_account...
https://www.reddit.com/r/facebook/comments/o3jbn9/another_on...
https://www.reddit.com/r/facebook/comments/o3knq7/wtf_fb/
https://www.reddit.com/r/facebook/comments/o3hy4e/when_will_...
https://www.reddit.com/r/facebook/comments/o3ikrm/can_anyone...
https://www.reddit.com/r/facebook/comments/o37dvi/fb_banned_...
https://www.reddit.com/r/facebook/comments/o3j9t4/soooo_i_ha...
https://www.reddit.com/r/facebook/comments/o34jzl/looks_like...
https://www.reddit.com/r/facebook/comments/o3il3q/help_rando...
https://www.reddit.com/r/facebook/comments/o3atfz/temporaril...