remember that Ryanair have not ordered standard MAX's, The Ryanair order is for MAX-200's a design that has an issue beyond that of the "standard" MAX airframes.
https://www.aerotime.aero/ruta.burba...pts-new-delays
A second emergency exit along the aft fuselage and behind the plane’s wings is a special feature of the 737-8-200, ordered by the low-cost giant. The new set of doors was necessary to increase the certified seating capacity on the modified MAX 8.
I would imagine that Boeing would want to get the "standard" MAX off the ground before they focus on the -200.