Actually, the room ready text will go to the number in the
MDE account in which someone attached the reservation.
So, if it hasn’t yet been attached to someone not going it’s not an issue as someone e esle can add it.
But, even so, at the front desk they can update the number for the text and anyone registered on the room who is connected can see when the room is ready. My DD saw it for our recent stay before I did since I was hanging in the pool and she was eating lunch.