I contacted FCA about Navigation updates and I got this reply
When available, navigation map updates can be purchased by visiting https://chryslergroup.navigation.com/ and selecting the Make, Model and Year of your vehicle.
In addition, Software updates for the entire Uconnect System (including Navigation software) are released from time to time. These are available for download by visiting https://www.driveuconnect.com/support/software-update.html and can be performed at no charge from the site. When I checked the first link the 2019 was not listed yet
When available, navigation map updates can be purchased by visiting https://chryslergroup.navigation.com/ and selecting the Make, Model and Year of your vehicle.
In addition, Software updates for the entire Uconnect System (including Navigation software) are released from time to time. These are available for download by visiting https://www.driveuconnect.com/support/software-update.html and can be performed at no charge from the site. When I checked the first link the 2019 was not listed yet