Uconnect just said they are working on it and might be delivered in march. I asked to escalate and will see if that goes anywhereI did some research for you all.. I don't have a Uconnect 5 system but maybe try this guide?
Uconnect Radio Nav: Preparing a USB device for map updatesImportant: If you have a Mito or 500L, 500L Trekking, 500L Living, please make sure that you have the correct software version that allows you to update your map (version 11.815.xxxxx or higher)...help.tomtom.com
at the end of the guide, you need to connect it to your computer
Installing a map on Uconnect 5" Radio NavA map update is available for Fiat 500L, Fiat 500L Trekking, Fiat 500L Living, Fiat 500X, Alfa Romeo MiTo, New Fiat Ducato, New Fiat Doblò, Jeep Renegade, Lancia Ypsilon. Map updates are now ava...help.tomtom.com
maybe this will work for you?
seems like this is continued kicking of can down the road