It looks like from your picture if you remove the 2 bolts on the van side of the spring door limiter you might be able to swing the door further. Be careful to check that no body parts on the outside of the doors come into contact with your van body such as spare tires, door creases etc. Also watch the hinges that they can pivot as far as you want because the doors will become a very big lever and you could bend (or break) something out of shape will very little effort. Good luck.
2021 Ford Transit AWD Custom Euro
Formerly - 2007 Pleasure Way Plateau (06 Sprinter T1N), 1992 VW Eurovan Westfalia Hightop
Long ago - 1969 VW Westfalia & 1973 GMC Motorhome