With your recent findings, I believe Jio is about to announce its IPTV service soon. I have been chasing them over the emails about this but they always provide a system-generated email to me. I'm only keeping the Jio AirFiber connection because of this IPTV thing otherwise it's of no use as compared to a wired connection.
The IVR on the toll-free number seems to be working now but when I enter my JioAirFiber fixed voice number, it says "Invalid number provided".
Anyway, I do have a positive feeling about this IPTV service and hoping they start rolling out beta testing of this to actual customers rather than Jio Employees only.