Yeah, and?
I live in the MO side of the KC metro. I’ve never lived in KS. Yet, I’ve had jobs in KS, watch sports teams in KS and yes, I also eat at restaurants in KS. It’s not like we just stay to our own sides of the state line. Plenty of people in KS eat at and rep Arthur Bryant’s and plenty of people in MO eat at and rep Joe’s KC.
One of the shirts (Joe Arthur Gates Stack) he wears frequently in the show is a joke that references several of the notable BBQ restaurants in the KC area…as of right now, Joe’s only has locations in KS, Arthur Bryant’s only has locations in MO, Gates is mostly in MO, but has one location just over the line in Leawood, KS and Jack Stack is in both states.
Arthur Bryant’s DID once have a KS location inside the Kansas Speedway, but it closed several years ago.
Oh, and to answer OP’s question too…once you get outside of the city, suburban/rural folks in the greater KC area (and other non-city parts of both KS and MO) do have “country” accents like Ted.
I answered a little bit in a threaded comment above, but I will expound here.
Ted’s accent is 100% a rural Midwestern accent. I grew up in a town of 500 people about 45 minutes from downtown KC. That accent is the accent all of my neighbors had, and that I still somewhat have myself.
My Dad’s family is from Central/East Texas. Their accent is definitely Southern and sounds nothing like Ted’s. Both are very rural, country accents, but are very different otherwise. I imagine to a non-American ear, or even a West Coast or East Coast ear, they probably sound similar, just like I can’t differentiate between a New Zealand accent and a South African accent unless I’m listening to them back to back and very carefully.