There were a few cases of this in Houston.
In the 80s, Houston ABC affiliate KTRK-TV (Channel 13) ran the bilingual PBS children's show Carrascolendas early on Saturday mornings. On Sunday mornings, KTRK showed Infinity Factory and Vegetable Soup, which, if I'm not mistaken, were also PBS shows. There were probably more besides these, but I can't remember the titles of the rest.
Then-independent (now Fox) KRIV (Channel 26), I think, also had Vegetable Soup on their schedule at one time as well.
Another then-independent, KTXH (Channel 20), showed Rebop early on Saturday mornings in the 80s, which I think I read in a past retro TV schedule posted on here.
To my knowledge, none of the more well-known PBS shows were seen anywhere else in Houston besides the actual PBS station (KUHT, Channel 8 ).