I would write either "Have you ever seen me in a dream?" (meaning a dream as a vision when you sleep) or "Have you ever dreamt of me?" (meaning a dream as a wanted goal)

Sorry, I've been told by Customer Support that my original answer was deleted because the phrase "like a daydre@m" had been flagged as violating the Community Guidelines. The answer was basically: No, the questions are not the same, because there are two different meanings of the word "dre@m".