My only issue with the lack of integration with Maps, is that I can see where my kids are in FindMy, but the map is static and while showing POI's, I am unable to actually click on them to see where they are (if they are at a POI).
It would be nice to have a button that allowed you to "Open in Maps" if necessary for this function.
What I find very interesting is that if you are texting with someone you are able to track, it shows where they are in the iMessage app if you click their pic at the top of the page to get to their "info"....when you look at it there, you CAN click the info button and "open in Maps"!!