I feel this statement "you must be very hungry" seems to be very suitable for being used in a tag question.
To be honest, I feel very uncomfortable if I can't use that statement in a tag question.
It seems like that statement was born to be used in a tag question.
However, according to my research, question tags such as "mustn't he/you/we..." are very rare.
So, How do we form this statement "you must be very hungry" into a question tag?
For example, "You must be very hungry, mustn't you" but it sound unnatural.