i'd really say i have a lot of interests if i REALLY think about it. steven universe, metal family, danganronpa, south park, vocaloid, and trying to get into persona for my friend and zelda for my girlfriend. i'm also interested in doki doki literature club, wallace and gromit, craig of the creek, and probably more i can't think of.
my girlfriend is very open about her interest in zelda and talks about the zora and the triforce a lot. she constantly talks about zelda, the game, its characters, plays it a lot even when we're talking sometimes, etc.
she has more interests and hobbies but her main hobby is gaming, specifically zelda. i have mentioned in my posts that "ivy" is a gamer.
ivy is neurodivergent just like me, and i don't want to be rude by telling her i wanna talk about my interests because that would be seen as me not being interested, and i really am interested in zelda and trying to get into it for her, like i said.
i hardly ever mention my interests because i'm very closed as a person and only mention my interests to people i'm really close with, like my mom.
she has asked me what my interests were a few times and i've talked about them, and i usually get a "cool" or "nice". i really don't think she'd be that interested but she might be.
one other thing? i can't get her into my hobbies or interests either despite her wanting me to get into hers. one other interest i have, american dad, i managed to get her to watch an episode of but that was only because it was made by the creator of family guy.
she has zero interest in my interests and i wouldn't say she'd rather play a videogame than go out with me or do my interests, but well, she would rather have me around, of course. but... she doesn't like going out a lot and would rather play a video game than go out and is always hesitant when i ask her if she wants to do something i like.
it's not that she doesn't like me or prefers that to me, she really does like me and doesn't prefer it, i'm just talking here.
afterwards, maybe i should stop talking about ivy and me so much. there's really nothing WRONG with our relationship per se, i just need ideas on what to do to be more open.
Not diagnosing, but if Ivy's autistic (I'm not an expert, though I myself am autistic), it could be very hard for her to talk about something else. I'm not necessarily saying it is hard for her or that she is autistic, as you just said she is neurodivergent but not exactly what condition she has, but I know that with me, if I'm really hyperfixated on something, it can be very hard for me to find other interests or talk about anything else. If it's watching a show, I will often watch it for long periods of time. If it's gaming, I will game for long periods of time.
It might be genuinely hard for her to do and talk about anything else and she might not have an interest in your topics not out of rudeness or hatred for you. I think she still loves you, it's just it could be hard for her. Of course, this is just speculation based on my own experiences. The same could apply for neurodivergent people in general, not just autistic, though.