Honda City digipad does not support onlus8t
Isn't the digipad Mirrorlink only? The 8T supports standard android Auto, however, mirrorlink is not officially supported AFAIK.
Just a wild guess, you may need to turn on USB debugging under developer options.
Not sure why, but my brother's OnePlus 6T couldn't connect with Hyundai Verna 2021 SX infotainment system without turning that on.
OnePlus True Wireless Buds Survey
by Leo X., 2021-04-27