I don’t think Harbaugh will sign with the Dolphins because they don’t have salary cap space, a QB or a good roster.
Harbaugh is not going to go into the season with Ewers as his QB. Outside of Mendoza, the QBs that will be available for the Dolphins to draft aren’t that much better than Ewers.
OC Kubiak is the perfect coach for this team based on similar offense, players, and the patience to go with Ewers and if needed draft a QB in 2027. That will also clear up the cap space and allow Miami to draft BPA this year. This draft isn’t strong with superstars but there are a lot of good players who will be very good.