When Blue Ridge PBS (WBRA in Roanoke) was in the process of returning to the FCC their two stations in far southwest Virginia (WMSY and WSBN in Marion and Norton, respectively), they launched "Southwest Virginia Public Television" in 2014 which was carried on local cable systems that once carried the prior two stations. The two over-the-air stations left the air in 2017, but in 2022 they launched "PBS Appalachia Virginia", which is a streaming-only (and cable) PBS broadcaster and has no over-the-air presence.
There's also low-power KCWT in Brownsville, Texas, whose 21.4 subchannel serves as PBS for the Rio Grande Valley after KMBH went dark in 2018.