All channels show in the app on my TV as well as Samsung phone, however there are missing channels on the ipad app, like all local ones and even some paid ones like ESPN, others like HBO are there.
I have uninstalled/reinstalled the app. I also made sure the ipad was updated.
call 800-comcast select tech support for TV/cable. ask the agent to be connected to app support team. ask the app support team to refresh your app entitlements.