I can't turn on Wi-Fi, all the appears in the Wi-Fi menu is a screen saying: "Use Garmin Express to set up Wi-Fi on this device. Go to garminconnect.com/start for more."
I think there used to be a button to add a network, and you could later just enter the password and connect, no?
This is the situation after update to 15.20 and a factory reset, can't say which caused the change (if indeed it used to work, maybe I'm imagining things).