I am not seeing much of anything there based on this tour from early 2026: Inside Gilley’s Casino — Kansas’ Brand New Casino in Park City, KS (Full Tour)
The guy also says at 6:30, “Now these are HHR machines [historical horse racing].” Admittedly, I don’t have any experience playing those types of slots. They may not be beatable, though I didn’t even notice any advantage play slots in the tour I saw.
I haven’t gambled in Kansas yet, but it seems like your best bet would be to check out other casinos if it’s not too much of an inconvenience. From what I saw online (not great footage), the Kansas Star Casino doesn’t seem that far away and looks to have advantage games. If anyone reading this has more insight, feel free to weigh in.