Not available in Fire TV Stick too. But I'm able to access it from my Airtel Wifi.
Not only Airtel TV. Even Jio TV and Idea TV apps are working fine for me using my Airtel Broadband data after registering using Airtel, Jio, Idea numbers in their respective TV apps. But I think its nothing to do with these apps since this update is from Hotstar itself.
Bro what I'm trying to say is Airtel TV App will work with all other Network Connections too not limited to Airtel Network alone.