I have TV access to the regular ESPN channels (ESPN, ESPN2, ESPNU) but I don’t have access to the ACCN or SECN. I am an ESPN+ subscriber (and live outside of Pittsburgh) and I can generally watch every Pitt game on the ESPN network including ACCN via the ESPN app with my ESPN+ login (except the Miss State game on SECN was blocked).
In general what SMF said is true however you can’t watch games on ESPN, ESPN2 or ESPNU with ESPN+ on the app if you don’t have TV access to that specific ESPN channel. When DirectTV contract was suspended in September, I couldn’t watch the Pitt/UC game which was on ESPN with my ESPN+ account on the app, So it’s more convoluted than it needs to be.
In the app, the game tonight is specifically indicated to be on ACC Extra/ESPN+ and the same for Sam Houston. Cal game is TBD. The rest of the January games are ESPN, 2 or U except for Clemson which isn’t listed yet.