This is what they said and it very clearly excludes the scenario in question:
> The extra layer of security provided by end-to-end encryption means that the content of your messages and calls with friends and family are protected from the moment they leave your device to the moment they reach the receiver’s device. This means that nobody, including Meta, can see what’s sent or said, unless you choose to report a message to us.
Not if you don't chop the quote like a creationist. The next sentence rules out any sort of creative games like “we send it to the receiver which decrypts it and bounces a copy back”:
> This means that nobody, including Meta, can see what’s sent or said, unless you choose to report a message to us.
If they were playing games and got sued, I'd be quite surprised if they didn't get laughed out of court for claiming that “nobody” actually meant “the FBI”.
> The extra layer of security provided by end-to-end encryption means that the content of your messages and calls with friends and family are protected from the moment they leave your device to the moment they reach the receiver’s device. This means that nobody, including Meta, can see what’s sent or said, unless you choose to report a message to us.