I have a feeling there’s some distinction in the bing datasets between the imagery you see when you are above the two max zooms (usually newer and higher res) and the middle (zooms 3-8) which is used by MSFS, and then 9+ which is their full global imagery. I bet MSFS excludes a lot of the max zoom levels for some reason - maybe they are smaller chunks and would be harder to make cohesive?
For reference:
Zoom 1-2
Zoom 3-8
Zoom 9+
