Like @roboskull I was able to get it with my HDHR Prime using Xfinity once I mapped the channel.
But it's not working with TVE. I'm assuming it's TVE channel 6147.
I went to the website https://www.espn.com/watch/player?network=acc and was able to Link to my Xfinity account (it's using the new two screen login, username on first, pass on second) and when the player window came up it freezes. Click play and nothing happens.
Figured, OK glitch with ESPN so I tried to rescan ACC-6147 on both of my Xfinity-TVE servers and get this error even after updating to v2021.12.16.2117 and using the Update Password trick.
notAuthorized: ACC Network and ACC Network Extra are currently not available with your TV provider. For a complete list of TV providers offering ACC Network and ACC Network Extra, check www.GetACCN.com.If you dont see your TV provider listed, contact them to demand that they carry ACC Network and ACC Network Extra.