You have sent a message to someone on Facebook Messenger but just after sending it you realize that you should not send it and that’s why you want to delete it immediately so that he/she can’t view it. And to unsend it you just select that message but you are unable to unsend it?
If this is happening with you then don’t worry as this guide is going to teach you how to fix can’t unsend message on Messenger along with why you can’t delete/unsend a message on Facebook Messenger.