Can't tell if my gf is uncomfortable with me being bi or not

I started dating this girl not very long ago, but it's my first real relationship with a girl where we're actually official and not stuck in some kind of limbo or just hooking up. We're both 26. She's a lesbian and I'm bisexual. She's never been with a man nor has she ever dated a bisexual woman. She had 1 ltr with another lesbian and a few other short relationships with lesbians so I know some of this might be her navigating a slightly new dynamic.

She knew from the get go that I'm bisexual and was fine with it. I've never heard her talk badly about bisexual women and she has quite a few bisexual friends herself. Whenever I talk about past relationships with men she doesn't seem to get jealous at all, but when I talk about past experiences with women she does get a bit jealous. This is all for context.

What makes me feel like she may be uncomfortable is two things. The first is that whenever we watch shows or movies, if I make any sort of comment at all about an actor/male character she asks me if I think he's attractive. Whether I say yes or no, she doesn't really react to the information. She never does this with actresses or female characters unless I ask her first, then she'll ask me.

The second thing is that she told her mom she was dating me and apparently her mom asked if I was bisexual or lesbian. When she told her mom I was bisexual, her mom said dating lesbians is better because bisexuals always leave for a man. Now to my girlfriend's credit, she told her mom how wrong that was and lectured her on it, but it still made me feel weird that she told me that. She said her mom had a traumatic experience with a bisexual man and that's why she said what she did but that she doesn't agree.

I don't know if any of this is really a big deal to talk about with her, but I'd love the perspective of other bisexual women. I don't feel it's that egregious overall and can be solved with more communication about my feelings but at the same time I don't want to make mountains out of molehills.