Yes Trevor. I have ESPN because my HOA includes it in our Charter Spectrum cable package. I have ESPN Plus because I pay for the Hulu, Disney Plus, and ESPN Plus bundle separately. All of these work great on my Apple TV, no problem.
On my insignia TV that has Roku built in, the ESPN app “live shows” work great. On my Insignia TV with Roku built in, the Spectrum App usually works great and when it does not I reset the app and it begins to work again. On my insignia TV with Roku built in ESPN Plus does not always work.
I often get the “media not allowed” message. Yes the procedures in this thread like deleting the ESPN app and reloading it and resigning in again sometimes work, but it is a band aid and the “media not allowed” comes back.
Through my experience this is a Roku problem. I do not have this problem with AppleTV, so I bought another Apple TV and connected it to my Insignia TV that has Roku built in and I do not get the “media not allowed” message anymore.