App/Scene/WindowGroup - How to have different windows (not multiple)?

Aside from Settings (on macOS) is there a way to have different windows (e.g. a main UI and then a separate UI)?

I see that there's id: available which suggests multiple WindowGroups and being able to reference different groups.

And if this is possible, how can I manage the multiple WindowGroups?

Interestingly, the header shows an example where multiple WindowGroups are used and one is assigned a title string for uniqueness. And Commands can be added to both. The question becomes: How does one access the second WindowGroup to perform a New Window command with the added commands?
So I'm guessing this is waiting on an Xcode/SDK update because I haven't found any way to get it working, aside from falling back to AppDelegate.
I'm also waiting for this functionality. It's a little worrisome we're at Beta 5 and this hasn't appeared though. I don't see the example you mention in the headers, which makes me worry they removed it?
I also really look forward to this opportunity
Yeah, beta 5 and we still can't open a new window. Are we actually going to have a usable SwiftUI in Big Sur? This is quite important as many developers are likely depending on this appearing in time.
I have this problem, too.

I can't find a "SwiftUI" way to open new windows having a different layout than the main window as action of a Button or Menu.
This is a very basic thing, so this should be possible in SwiftUI 2.

App/Scene/WindowGroup - How to have different windows (not multiple)?
 
 
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