FoV is more than what the settings say?

According to my monitor setup, the fov calculators say I should have around 68 degrees.
But when I put the cockpit view setting at max(55), it seems like it gives me more fov than I should get. Does anyone see this happening?
I guess it might be an issue with me having a 29 inch ultrawide…? I can see quite a bit out of the driver’s side window and some of the side mirror on the opposite side.