Gottcha. Now in theory, both fork legs would fully extend under gravity and the axle would be a straight bolt in. So is the wheel on the deck and pushing up on the right fork leg and that's why that leg is shorter than the left? That would explain everything.
Maybe as a simpler next step, make sure the bike weight is supported and remove the front wheel. Then slip the front axle in and see if it sits where it's supposed to be with no load on either leg. If the axle isn't a slide it fit, then the fork legs have to be checked. You can start by making sure that the tops of the legs are equal distances above the top triple clamp.
If they are and the legs overall are different lengths, they have to be removed and stripped to work out what's missing/wrong.
If that's OK, then try to refit the front wheel without any load on the front end and see if it's OK.
Maybe as a simpler next step, make sure the bike weight is supported and remove the front wheel. Then slip the front axle in and see if it sits where it's supposed to be with no load on either leg. If the axle isn't a slide it fit, then the fork legs have to be checked. You can start by making sure that the tops of the legs are equal distances above the top triple clamp.
If they are and the legs overall are different lengths, they have to be removed and stripped to work out what's missing/wrong.
If that's OK, then try to refit the front wheel without any load on the front end and see if it's OK.