Enable DPAD navigation control of TWA app (chrome customtabs) on android TV

I've successfully converted my website to TWA app. However when running the app on Android TV box I can't use DPAD remote control for navigation how hard I tried cause there's no such clear directives online on how to implement it... find below few codes on attached files from: 1/- [login to view URL], etc... Moreover, as the app relies on chrome; put on a service to force chrome to download silently if it's not installed or update...