JioTV won’t be coming to any tv streaming platform as it would be bundled with JioGigafibre’s Giga TV, (just as airtel tv comes with airtel’s smart stb); they would never release a tv version , not in the near future;no smart tv has it, nor any android tv. It has to be sideloaded even on firestick as well and doesn’t function properly.
Jio Cinema is different and is available on other platforms but no clue if its under development for WebOS.
As far as Sony LIV is concerned, it is under development as per Sony but no expected date has been given. It maybe released next month or the end of the year, no one knows.
The best way to get these and many other apps is to get a firestick. Even if these apps are released for LG they might not support many older tv’s, just like with hotstar.