Fold 4 Hinge Repairable?

So I have a fold 7 as well as a fold 4.

I decided to open up a darkstar line on my fold 4 (fold 7 isnt paid off and i hate boost mobile, data is always slow and runs out quickly lol)

Fold 4 works fine. But it has the same issue everyone gets... is it possible to have it fold open all the way again without any expensive repairs?