Hitron Coda56 modem not part of Xfinity network

I have had a Hitron Coda56 modem for about a year now, and it has been working great, until 4/2/2025 @9am DST.  At that time, while I still had my connection to the internet, the Xfinity stream app we use on our Apple TV boxes stopped recognizing the internet signal it was connected to as being part of my Xfinity home network, and I couldn't use the Xfinity stream app any longer.  Further troubleshooting using the Xumo box and signing onto the Xfinity stream app, I get the Now TV channels, and do not see local channels for my area, which suggests that the signal is not recognized as an Xfinity home network signal by the Xfinity stream app on multiple devices within my home.  I tried doing a factory reset of the modem, and that did not fix the issue.  It looks like I will have to rely on other streaming apps to get the local television channels that we use the stream app for, or pay $15/month for an Xfinity modem.