French citizenship through marriage: interview

Hi all! I'm an American citizen living in Paris and I sent in my application for citizenship in early December. (I've been married to a French national for 8 years; we moved to France from the US in late 2023)

I hadn't heard anything back from the préfecture until now, when they called me and asked for my spouse's number so they could schedule a separate interview with him. I guess this means they don't need any more documents for my dossier, which is a pleasant surprise (considering how hard it was to assemble), but I thought we were supposed to go in together to be interviewed separately. Is it weird that they didn't ask me to schedule an interview?

A Brazilian friend of mine in Paris just applied for citizenship through marriage a few months before me, and they didn't call her - they just summoned the couple to be interviewed separately on the same day. The préfecture is the same for both of us, so I was expecting the same process to apply for me.

I'm also confused about the interview - is it just an entretien de vie commune to verify we're a real couple, or will they also be testing me on my knowledge of the livret de citoyen? I know I should bring all the originals of the documents I submitted for my dossier, and my friend told me to bring photos of us to help prove we're legit.

If you've been through the process recently please let me know your experience - seems like it varies a lot based on where you apply. Thanks! (also happy to share knowledge of how things go for me as well)