I had a new one yesterday with Delta which brought up two questions.

The gate agent, and only gate agent working "forgot his key" in his locker so he could not gate check my baby stroller.
Is this even a thing?


We had a 3 hour ground delay where we stayed attached to the jet bridge the whole time to fix an oxygen mask in the cockpit.
I sat in the bulkhead so was close to the action. Guy in safety vest came on and asked if I wanted my stroller back so I could deplane and go back to the lounge for a bit. Awesome! But since it was "checked all the way through" and not "gate checked to be available on the jet bridge after the flight" he said never mind and could not retrieve it. How would that work?