Roku channel apps are developed and provided by the channels themselves. The channels decide which platforms they are going to write apps for.
TSN FAQ re devices they support makes no mention of Roku as of Mar 30, 2021:
Which devices and platforms does TSN support?
Whether you subscribe to TSN through a participating TV service provider or through TSN Direct, TSN supports the following:
- iPad, iPod and iPhone running iOS 9.0+ with AirPlay
- Android tablets and smartphones running version 4.0+
- Windows desktop, tablets and smartphones running version 8.1
- IE 11+ (Must be on a Windows 8.1+ computer)
- Chrome 58+
- Firefox 52+
- Edge 14+
- Safari Mac 10.6+
- Samsung SmartTV and blu-ray players with Samsung Smart Hub: 2014 – 2018
- Xbox One
- Apple TV 4+, OS version 9.0+
With more to come soon!
SPORTSNET, as far as I can tell, is a cable-type channel. Their Sportsnet Now app permits you to view Sportsnet content on computers, which I assume also includes web browsers on mobile devices, and is available at no charge if you have a paid provider subscription that carries Sportsnet. It can also be subscribed to directly if you have no such provider subscription. I've not found any mention on the Sportsnet Now page indicating they have made apps for streaming devices.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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