Just passing by to share my experience, in case there are others in a similar situation.
In the end of August I received the notice my citizenship interview had been scheduled for October 6th. Local office was San Bernardino and, from other timelines, I saw they were doing same-day oaths. Great!
Only one caveat. Last year I booked an international trip to celebrate our anniversary, and we were supposed to leave on October 14th. With a same-day oath, I would no longer have my green card to travel back to the US.
I did as other VJ members recommended and got in touch with the Passport Agency line to try and schedule an appointment, and was lucky enough to get one in LA for October 12th. Mind you, I called them exactly after leaving my oath ceremony on Oct. 6th.
The passport was ready for pickup today at 1pm! Success.
So if you have an international trip coming up and are in the limbo post-oath, I sincerely recommend contacting the Passport Agency service before giving up hope. From beginning to end they were very accommodating and courteous.
I'm not going to lie, having no passport the night before our trip was SUPER stressful but I'm glad it worked out in the end. (And the passport is the next-gen one, very nice!)