I remember there being a manual crank screw to close/open it. You can try that first and depending on the resistance, you'll know right away if it's gummed up. More than likely the sunroof will need to be swapped out. It's not too crazy of a job.
Dude is likely a paid bot. Consistently on Liberal Self-owns and just spews the dumbest shit he can think of for engagements. At some point when your account garners enough engagements and activity, it can be sold for big bucks. Half these idiots with garbage takes do it for that.