The Galaxy Store for Samsung Devices now supports Progressive Web Apps; your progressive applications can be listed there.  In the Galaxy Store App if you navigate to My Apps->Web Apps you can see the PWAs that are presently available.  But why target PWAs?

Progress web applications have a advantages over native apps. They can run on a variety of operating systems. PWAs tend to be smaller and the installation process is simple. Updates to a PWA can be deployed much faster than a conventional application since updates don’t need to go through an application store. Because of the sandbox in which most browsers run PWA applications have much lower potential for exploiting someone’s computing device.

A license agreement is a basic requirement. You need to own the app and give Samsung permission to have the app listed in their store. While this is a work in progress it is something that is available today; though presently the process is of enrolling an application is manual. You would need to e-mail pwasupport{-at-}samsung.com (replace the {-at-} with an @. I don’t list e-mail address plainly as not to feed to spam bots). Someone will review your web application and assist with getting the application listed.