Yeah. Tyler's KZEY had a Sunday afternoon jazz show, as did the late, great Soul 73 in Dallas, hosted by Roger Boykin.
Commercial AM jazz was a thing for a good while in the DFW area, we had a full-time station for a good while from the late 70s thru the early 80s.
As a kid, I would pick up AM Jazz out of somewhere in Iowa, on Sunday nights.
Other than the Iowa thing, these were all stations whose listening demographic was primarily African-American. I couldn't get the Iowa station during the day, so I don't know. But their commercial spots seemed pretty much Anglo-American in focus. But the music was definitely not, at least the jazz.
The ethnic make-up of the different jazz programmings (AM and FM) were/are interesting. The Anglos played one thing, The Nubiains another. Very, VERY little crossover. You could hear both Julie London and Nancy Wilson, if you know what I mean, just not on the same shows.