I was on the 737Max 3 times this week. On my longest flight (5 hrs) I was excited to be on one of the FINs that has wifi (and the flight status in the app indicated it would). The lead attendant refused to even try to turn it on, saying that the plane absolutely did not have Wifi. Ironically my connecting flight was on the same plane and the new crew had the wifi on when I rebounded an hour later.