I'd say this isn't just an AI overview thing. It's a Google thing. Google will sometimes show inaccurate information and there is usually no way to correct it. Various "feedback" forms are mostly ignored.
I had to fight a similar battle with Google Maps, which most people believe to be a source of truth, and it took years until incorrect information was changed. I'm not even sure if it was because of all the feedback I provided.
I see Google as a firehose of information that they spit at me ("feed"), they are too big to be concerned about any inconsistencies, as these don't hurt their business model.
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