Why do Protestants (especially Reformed) generally distinguish Jesus, the Son of God, from Michael the Archangel?

I just read the book of Daniel all the way through for the first time and found myself curious about Michael. I’ve heard that groups like Jehovah’s Witnesses and Seventh-day Adventists often equate Michael with Jesus, but from what I’ve seen, mainstream Protestants usually treat them as distinct. Why do Reformed theologians generally distinguish Jesus, the Son of God, from Michael the Archangel? Specifically, what are the main theological reasons? And what particular attributes or roles of Michael are highlighted in Scripture, and how do these compare to those of Jesus?