Tubi App, are you blocking it?

Just be honest....  Does Xfinity Block TUBI?  I'm guessing the answer is yes because Tubi is a free service & they offer quite a lot.  It works fine on my firestick however I get an error message when using the Xfinity box.  I understand you want to sell us channel packages, but Tubi is certainly no "industry villain".  Please fix & give us Tubi back.  Thank you!