Mine was resolved when they changed the charging ports below the Radio.
ok...I think I have the fix. I'm 99% certain the culprit is Sirius XM as the truck's computer does recognize it as a "connected/installed device". (Sirius XM just did a huge update this weekend....) Here's what I did.
Disconnected everything (phones etc.)
Deleted my phone from the truck and then re-paired and added it.
Turned Bluetooth and WiFi Off.
Drove to an open parking lot and did a Sirius XM Radio refresh.
Waited 5 minutes to ensure the signal was received.
Turned truck off for 1 hour and 15 minutes to ensure complete shutdown.
Went into my Apps in my phone and cleared the "Uconnect App" cache.
Also cleared Google Assistant cache and the Sirus XM App cache.
After 1 hour and 15 minutes- I restarted the truck and noticed that as the system was firing up it was taking a little longer than usaul as it was (thinking......dots waving across the screen)---it usally fires right up.....
When it fired up everything came back up as usual---HOWEVER- I noticed that the channel on Sirius XM was not listed as "33" as it was when I shutdown the truck. It was "playing" channel 33 however, the display listed a 6 digit number. ( which is an indication the Update refresh was received.).
And then---the "Device not supported" message never came on!!!! I just took the truck out and gave it a thorough workout setting directions in the Nav App and driving for an hour. The "Device Not Supported" message never came on and has not returned since. The exact same thing happened a month ago, the last time they (Sirius) did an update (over the weekend) and by Sunday the next time I started my truck I noticed Sirius XM was was on channel 2----which meant it received an over the air update.
**My truck is usually parked in an underground garage--so I think I was never really getting the over the air update on start up. But just having done it outside in an open parking lot, letting it sit for an hour and 15 minutes- when I started it, it connected with the satellites and received the update----and as I said- the message disappeared and hasnt returned since.
Hope this helps everyone, worked for me.