xfinity speed upgrade killed my streaming apps

I received an Xfinity message today that my upload speed had been increased. Coincidentally with that, YoutubeTV, Peacock, Prime, Roku and others stopped working..."no internet connection." Not only on my Roku stick, but also on one of my Samsung Frame TVs. Netflix and ESPN+ work normally everywhere. And all the streaming apps still work on my wifi-connected phone and iPad...and on my other Samsung TV. The ONLY changes to anything was the Xfinity change in bandwidth. I've unplugged and restarted my Xfinity router/modem. And restarted, reset, and unplugged and replugged my Roku stick...but again, one of my TVs (no relation to Roku) has the same problem. (Everything is on wifi and both bands 2.4 and 5 are transmitting.) Help!