Are farts genetic? Is there a way to make farts more intense?

My gf and I have been together for close to 3 years, and right now she is very comfortable farting around me. The problem is, she doesn't seem to fart much at all. When she does, they are usually pretty small/airy.

When she eats particularly gassy foods, she farts a little bit more, but they just tend to smell worse rather than have any more intensity. It's not super noticeable at that.

Is "fart style" mostly genetic? Personally, I have frequent loud, bubbly, and intense farts by default, but I also have a pretty hearty diet that lends to that. I'm wondering if more fiber/protein might work, but she already eats pretty healthy as is.

We have thought about trying things like inulin powder, sugar free gummy bears, protein powder, etc., but I don't want her to fuck up her system too bad and just end up shitting herself. She has a bit of a sensitive stomach already.

Curious if anyone has had any experience with something like this, and could share some tips.