The Galaxy Fold has showed that Samsung is more interested in inwards-folding devices for now, but the company is clearly open to exploring the outwards-folding side, as shown by a recently unveiled clamshell phone patent. Additionally, it looks like Samsung already has an improved hinge that allows the two halves to flatten on the fold.
https://www.notebookcheck.net/Samsung-s-patent-for-a-clamshell-foldable-phone-revealed.413832.0.html