How the MMEL (FAA) and MEL (operator model-specific version) works is that anything NOT required for safe flight is listed in the MEL. Otherwise everything would have to be 100% working.
So I would not expect MCAS to be listed in the MEL since it's required for safe flight.
So I would not expect MCAS to be listed in the MEL since it's required for safe flight.
We'll see.