The agent started by asking some more details about the timing of the divorce and when I filed the i751. She also asked if I planned on getting divorced when I applied for the green card. I clarified that we got divorced because my ex-wife came out as lesbian and she asked a few follow up questions to understand more about it and why it was not an issue before.
I would say she was just doing her job and trying to probe for any contradictions. However my marriage was bonafide and I never intended to get divorced, so I think made that pretty clear. I didn't bring any additional evidence besides my divorce certificate. I wouldn't worry too much about it, but just be prepared for some potential questions.
I also got a notice today that my interview is being rescheduled. I did mention to the agent that I have an international trip mid November and she noted that in my file. I think they saw that this morning and automatically canceled my original oath date.
Kinda sucks since I think the original date would've been fine for getting an emergency passport, but now at least I don't have to stress about that.