xfinity modem in bridge mode; it works but app shows as unavailable

The subject really says it all.  Today, I picked up an Xfinity Gateway, set it up in bridge mode so I could use my wi-fi router.  The process was not super-smooth, but eventually it worked, and I am typing on a computer connected to this network right now.  However, the xfinity app shows the modem as "status unavailable".  With my previous owned modem, this was not the case -- the xfinity app connected with my modem just fine.

Incidentally, the reason for this switch is that my old modem started consuming insane amounts of data, like far more than I could possibly use.  After I got past multiple people trying to upsell me, someone convinced me to switch for an xfinity modem as a troubleshooting measure.  But I need to be able to monitor data consumption on the app, or else I won't know if the modem is fixing the problem or not.  So kind of key to make sure that it is still updating.