In my old Civic I had an aftermarket headunit with Android Auto.
Very often I'd get a connection error, most of the time it was down to small debris in the charging port.
Try a can of compressed air to blow it out, or use a small pin to scrap anything you can see.
Sometimes a simple restart of the phone fixes connection issues.
Or try a new lead...
Sent from my GM1913 using Tapatalk
Yes. The courtesy car I used had one. It's a 3 in 1 and comes in orange.Are there OEM Seat phone leads ?
I've had issues with Android auto in multiple cars using Samsung or OnePlus devices, particularly Samsung.
Anytime I use Google Pixels I don't encounter issues.