Yes. I use SteamOS and Bazzite (I have multiple TVs with different computers for thus) as my sole streaming interfaces.

• https://flathub.org/en/apps/com.github.iwalton3.jellyfin-media-player
• https://github.com/aarron-lee/crunchyroll-linux
• [github.com/aarron-lee/StreamingServiceLauncher](Multi-launcher for proprietary crap like Netflix, Hulu, etc.)
• https://github.com/shy1132/VacuumTube

Just add those as “non-steam games” and you’re mostly good to go. For some apps, like Jellyfin, you need to enable keyboard navigation (a.k.a. “gamepad controls”)