JC - "I wonder if, instead of being a Steam Game, there could be more potential in web games of this type (and others!), where people are playing the game before they even realize it.

Running all of Unreal inside a browser is impressive, but lightweight bespoke web game solutions should be quite effective today, even on mobile.

I feel a little ill when I consider all the layers of inefficiency in a web app versus bare metal programming, but the majority of gaming hasn’t been efficiency limited for a long time."

Hopefully it will release later this year to coincide with iOS 18. As other commenters have mentioned, it's already available for developer testing.