Integrate with fire tv “live channels guide”

Just curious if that is something being worked on? Pluto tv and Philo are the only sources able to integrate live channels into fires TV guide.

This is handled by a whitelist from Amazon. AIUI, Channels is already set to support this feature, but Amazon hasn't given the green light to Channels.

Very cool. Hopefully they activate it. I’m assuming the same is true for android tv live channels app?

No. Android TV Live Channels involves quite a bit of additional work:
https://source.android.com/devices/tv/index.html#support_for_third-party_tv_inputs