Assuming you mean Apollo Group TV, their supported devices page lists Roku as “NOT SUPPORTED”. Also, from googling around, they might not be a legal/licensed distributor of the content they provide. (Which, if so, may explain the lack of availability on Roku.)
Ya it looks as if Roku isn't supported. Have you tried reaching out to their support to confirm? Also seen some iffy info on the service. @Strega2 def hit most likely the main reason, they might not be a legal/licensed distributor of the content it has which will definitely keep it away from being available with Roku.