As the code image below snipped from here: https://www.bing.com/api/maps/sdkrelease/mapcontrol/isdk/loadmapasync
The NVDA will announce the 'zoom in' button on the map as 'Current level 11, Zoom In Button Zoom In' because it recognizes it as aria-label + role + title and it is not very friendly. I suggest that you could make some improvements as required.
