If the Spectrum TV App is not showing all the channels, first check if you’re on a kids account with parental controls enabled. Also check to see if any trial subscriptions have expired. You can switch to the main account to access all channels and pay for subscriptions.
To reset your Spectrum WiFi/Router, start by unplugging the modem first. After this has been unplugged, turn off the router, plug the modem back in, wait for two minutes, turn the router back on, and wait for two minutes more. This will reset your Spectrum WiFi connection.
Firmware bugs are the main cause for the Spectrum TV app not working on an Apple TV. Therefore, you should keep the app up to date. Poor internet connection, insufficient space, or using the app away from home can also cause problems. Spectrum does not work on 1st, 2nd or 3rd generation Apple TVs.