From what I’ve read/know, the source for Tiberian Sun and Red Alert 2 were lost a while ago. Doesn’t mean it can’t be reverse engineered at some point, but it’s challenging. I’d LOVE for those to be next though!

The TV/mobile apps vary wildly in their capabilities and performance. Swiftfin is better for iOS devices, but not sure about AppleTV. That’s my main gripe with Jellyfin overall.