How come there isn’t an ignite tv app for Apple TV
Short answer, might be Comcast.
This is a technology developed for/by Comcast in the US.. If they have not added it, it wont really be available for rogers to use it up here.
Doing some quick searches.. it looks like they MIGHT have just added technology for this recently for Comcast.. so something we might see up here?
Comcast allows customers to access their Xfinity TV service with a Roku app as well as their Smart TVs. There is already another thread in the Rogers forums asking about their availability on Ignite TV.
The status of plans for an Xfinity Stream launch on Apple TV seems to be a bit murky at the moment. There are reports of contractual and tvOS platform integration issues that need to be resolved but I don't know how credible these reports actually are. When Comcast does offer their app on additional partner devices, we'll see it here.