I use an Adaptive TPX radar detector on my 2015 wing and my 2007 ST. Mine is a version 2.0 and not the most current one that is shown here.
https://adaptivtech.com/products/tp...etection-system-north-america-version-p-01-01
I have used their products since 2005 or so (I forget when I got the first one). I do not know if it has a method of interfacing with the 2018 wings bluetooth system. You could contact them and ask.
It is waterproof and provides ample warnings. The only problem with my unit is the false alarms due to collision avoidance systems on newer vehicles and Trucks. That may or may not have been addressed in the newest version.
The version 2.0 is my second one. I replaced my original one when I failed to slide it into its mount properly (I was in a hurry and only got one rail engaged) and it fell off the bike after about an hour of riding. I hit a bump in the road in a small town near where I live. The detector left the mount and dropped on the road and was promptly run over by a car which moved it to the center of the four lane road (turn lane) I stoped, picked it up and it rattled but still worked and works to this day in my car as needed. But I purchased a new one (2012 or so I forget) when they had a rebate sale going on.
The new power/com interface uses a pigtail so that probably can't happen again (failure to put it in its mount properly). But as you can see it is a very durable device.
I don't know of any other device that is designed for a motorcycle, with a motorcycle specific mount and is waterproof.
Just as a back up you can do a search using "motorcycle specific radar detectors" and see what detectors are identified .