I have an update for my Dodge Durango Uconnect (2018). It seems that once I get AAWireless to work, it only works for 1-2 trips/connections. After that, the next time it tries to connect I see the unit boot, then the LED flashes blue for a little while like it's trying to connect, then the LED goes solid white. If the USB port was still powered (1 hour delay after the ignition turns off), the LED starts solid white, then flashes blue, then goes solid white again. In either case, AAWireless doesn't work.
I did identify a work-around so I don't have to completely setup from scratch each time. In the UConnect screen, I go to paired devices and make it forget the AAWireless device that's been discovered for Android Auto. Then (also on the UConnect unit) I disconnect my phone, wait a few seconds, then reconnect the phone. After about 15-20 seconds AAWireless comes up just fine.
If it matters, I do also regularly see the message "device not supported" on the UConnect screen like others have mentioned. Changing USB mode to the various MTP modes did not help (never connects this way).
My current settings:
Dongle mode = on
Passthrough mode = enabled
Start/Stop = enabled <<< because the USB port stays powered for 1 hour
Firmware = 2.0.1
App = 2.14.0
Phone = Samsung Galaxy S22