This seems like a very different case though. Phones are closer to computers in their functionality these days... where consoles aren't. They are computing devices, but hyper-locked down to do a very specific thing. Epic's case I thought was more geared towards payment practices, because they were tired of paying Apple part of their profits.
Also I can't see any way this would be possible without massive changes to the PS5 Operating System and functionality, and I could see Sony completely pulling out of the Dutch market before they spent money dealing with this... there is zero chance they allow a third-party store on the console.
Xbox on the other hand does seem to be moving towards making their next console a Windows machine though. We'll have to see how that turns out as it looks like they're possible allowing game installation from third party stores (not sure you'll be able to buy directly on the console though).