It's strange that Nova would target web tech as their top priority, and not Swift. If you're Mac-exclusive, why not advertise top-class support for Apple ecosystem app development? Since Nova is prioritizing web workflows, VSC is the elephant in the room and a very deadly competitor. It's free and open source, it's available on Windows, MacOS, Linux, and it can also be ported to the web. And it's Insanely popular and…
People who care already edit Swift in their favorite editor and use Xcode for the rest of the dev iOS process. You'd be better off trying to capture the hearts of people so that you're their favorite editor than specializing to implement the "rest of the iOS dev process" on day 0.
As an iOS developer, I think most people start off disliking Xcode but then settle into a reluctant but productive relationship with it. The only things I need to use it for (device simulation, interface builder) are hard to build and yet they're not the things that annoy me about Xcode. Or rather, I wouldn't rather be wrestling with them on someone else's ultimately buggy attempt at reimplementing them.