Local channels are missing, or disappear on my home devices

I see many questions and cannot fix my issues, regardless of the troubleshooting. My Hisense (fireTV) Xfinity Stream app will not show the local channels. My Samsung TV, with a Fire Stick, will show 2 local channels for a limited time, then disappear. My log-in on my PC will not show the local channels. My Android app on my mobile shows two local channels (ABC/NBC). None show the in town Fox station. I have installed, reinstalled, and restarted each device, the Xfinity Modem/Wifi, with the same results. I would also note that each show TV GO for each channel in the listing, local or not. I have seen that in some cases an account requires provisioning to re-estbilsh the local stations. I have used the Xfinity Assistant and it never addresses the issue no matter how many times I circle around. Please assist.  Thank you!