Back to the subject,
Can you share the EXIF information?
Is there enough info for Mapillary to get this right?
Have you tried to take a picture with and without the wide lens and uploaded it to see what happens?
Just a thought:
Maybe it’s possible to juggle around with there EXIF parameters:
ProjectionType=cylindrical / equirectangular
CroppedAreaLeftPixels=x
CroppedAreaTopPixels=-x
CroppedAreaImageWidthPixels=x
CroppedAreaImageHeightPixels=x
FullPanoWidthPixels=x
UsePanoramaViewer=true
But I have no idea what the values would need to be to get this right…