At this point perhaps Epic should just bite the bullet and make their own game console like the Steam Deck. I have to imagine many contract manufacturers such as Quanta, Foxconn, etc. would jump at the chance to manufacture a white labelled device for Epic to develop a platform on and brand.

Perhaps they could even make it in a phone form factor like the Nokia N-Gage so they can compete with Apple and Google.

Then Epic would be in a great place to show everyone how to provide an open platform that has no developer fees and no costs for developer tools. They can also allow other app marketplaces to be installed on it directly without the need for side loading.