Yes they are. But it depends on your location. If you're not in the KC area, you likely won't see the FS1 Royals games. All YoutubeTV content is dependent on your current location.
If you are running an android device, you can sideload this app and spoof your location to view Royals games:
https://play.google.com/store/apps/d...kegps&hl=en_US
But that only works on Android. (Not FireTV even though it's technically android)
Another option would be too pay for a VPN client that would allow you to select the KC location. That said, a VPN client will automatically reduce your streaming speed by half or likely more. So it's not a guarantee to work.