I wanna give her the benefit of the doubt, and say she's just being self-deprecating. Hopefully, someone that is elected to Congress would have better ways of figuring out common appliances than by asking her followers in a video. The internet, Lexie. It is a thing.
I don't recall having one anywhere I've lived, but it's not the sort of thing I would remember. The wife gave up asking me for one in this house. I spent a few years working at some apartments, and I think I unclogged/unstuck every garbage disposal in that place, at some point or another. But those horrible memories have faded, and I might surprise the wife with one someday.
As for the flies, I've always heard that disposals need to be cleaned out with things like salt or citrus peels or baking soda. Ice is supposed to be good for them.