I was reading and it looks like it might be possible. There's a CFG/SDK setting called LeftSideAngle/RightSideAngle, etc. But I was playing with it and didn't see any changes so maybe Chaseplane is overriding these settings.
In MSFS, as far as I know, this isn't possible. You can move the camera, of course, but you can't pan the whole flat projection, which is what I need.