No reason you can’t take multiple rides together. I did commercial multi engine, Instrument Airplane and Instrument Instructor all in the same ride.
I also did my Commercial Glider and Glider Flight Instructor both in the same ride.
Interesting fact, my Flight Instructor, Instrument, Airplane was my first Instructor rating. I did not have an Instructor, Airplane Single Engine or Multi Engine at the time. Not many pilots have jumped right into the instrument instructor with no other instructor ratings.
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