This is the direct link to Jiotv+ Play Store (early access) version:
JioTV+ - Apps on Google Play
Pro tip: Install the app on TV using mobile or web version of Play Store because it's hard to find the unreleased app on TV app.
I am using this on my Android TV now. In fact this version is more responsive compared to JIo STB's Jiotv+ app, must be due to higher memory (RAM) on the TV compared to Jio STB. Remarkable work done by Jio developers.