The Facebook Message About Page Deletion message below from "Guest" is a scam that is being sent via Facebook Messenger by cybercriminals to trick potential victims into clicking the link in it. The link in the fake Facebook Guest message goes to a fake and phishing Facebook website that steals account credentials and personal information.
The Facebook Message About Page Deletion Scam
If you were tricked by the "Your Facebook Page Will Be Permanently Deleted" scam, which appears to be from Meta Business Help Center, change your password immediately. The aim of the Facebook scam is to hijack accounts and use them fraudulently.