On CO with mainline jets, doesn't the GA working the jetway actually open/close the door ...and the flight attendants merely open/close it all the way and stow the door to the side (or secure it for flight)?

I would be surprised to see a plane door shut at the end of a jetway without a GA knowing it was closed. I supposed if I went down the jetway and saw the plane door shut, I'd bang on the door to so they could let me in