Advice for American guy dating Ukrainian girl in the US

I’ve recently met a Ukrainian girl in the US who is on a Uniting for Ukraine parole visa. She is very religious and all, we’ve gone on 7 dates and I’ve paid for all the dinners except for one where she offered to pay (it was Ukrainian food). The other times she didn’t acknowledge the bill but did thank me.

I’m wondering if this might be a cultural thing that is expected of guys? Thanks