https://techcrunch.com/2020/07/08/amazon-fire-tv-now-pulls-in-live-tv-content-from-sling-tv-youtube-tv-and-hulu-live-tv/

Amazon is upgrading its Fire TV’s live TV experience through new integrations with several live TV streaming services, including Sling TV, YouTube TV, and Hulu + Live TV. Live content from these services will now appear within key areas with the Fire TV user interface, including the Fire TV’s Live tab and Channel Guide, making Fire TV feel even more like a cable TV replacement than before.

Already, Amazon Fire TV had offered integrations with nearly 20 other apps in a similar fashion, including live TV apps like Philo and Pluto TV, as well as its own Prime Video Channels.