My Garmin nüvi uses maps from https://www.here.com/navteq and they don't use OSM data so even with my change there won't be any changes in Navteq maps.  However my nüvi can use converted OSM maps which will absorb the change.

Even though it may grab new data, it's still up to the router to choose best route.  The route through the underpass is around a quarter mile out of the way which definitely does not pass for shortest (distance) route.  I'm not sure what Garmin uses for timing when stopping at intersections.

Perhaps another change is a speed limit is added to Kipling and if it's high enough the Garmin router will notice it's a bad idea for bicycles.  I'm unfortunately not local to this spot (but you are perhaps!) to glean the speed limits on Kipling, and that *may* influence the router.  Else I don't know what influences Garmin uses to choose optimal/safe routes.