Steins;Gate Divergencies Assort is now available in Japan for physical and digital purchase on the Nintendo Switch.
The game’s Nintendo Store page can be found here, and its official website here.
The game’s physical edition, named Laboratory Report Edition, includes a new book containing a visual gallery for the three games, as well as a new story that takes place the day before Okabe founded the Future Gadget Lab. The individual store benefits for purchasing the game physically are also listed in this article.
There has been no word of an official English localization thus far from Spike Chunsoft.