Same here. Actually, the passenger side is not dimmable.I have the Limited model, and haven't noticed super bright glare from the side or rear view mirrors during normal night time driving. I recently had to use the dimmer on the rear view mirror (pushing the middle button). I noticed only the rear view mirror and driver side dimmed. The passenger side mirror didn't dim, nor does it have the edges like the driver side.
I took my 2017 Pacifica to the dealership for a safety recall(U64) today and told that the passenger side mirror was not dimmable.
They said they would fix it but I am not sure if they were aware of this issue.