wth facebook dont even allow deleting msg now

I sent one msg as page
I mean I own a page one persons sent msg and I replied
but I want to delete it
when try unsend or delete fb says other person will still be able to see it
I sent one msg by mistake and want that person should not see it
whatsa way plz help

Unfortunately, once the time limit for "Delete for Everyone" passes (usually only around 10 minutes), there is no official way to make the message disappear for the other person.
Facebook doesn't allow it after that window.
The only safe things you can do now are:

• Block the person from your Page (they won't be able to send messages anymore).
• Archive the conversation so it's out of your inbox.

Trying to use any tools, scripts, or extensions to force delete the message is very DANGEROUS and can result in your Page getting restricted or banned.
If they reply, just tell them it was sent by mistake. Most people will understand.
That's the best and safest approach.

Nah, you can’t fully delete messages sent from a Page. ‘Unsend’ only hides it from your side. The safest bet is to just follow up and say it was sent by mistake.

Meta Business Suite uses a different messaging protocol than personal accounts which often lacks a universal unsend feature for page owners. To delete a message for everyone as a page you must use the Messenger mobile app or Messenger.com within the first ten minutes by selecting the unsend for everyone option. If you are using the Business Suite desktop inbox and the ten minute window has passed you can only delete the conversation from your own view while the recipient retains their copy. Your best chance is to immediately switch from the Business Suite interface to the standard Messenger app to see if the unsend option is still active for that specific message.