L.E. ..to work on a doc app with multiple windows. For the rest it works just fine, I'm close to launching my app ported from iOS and it helped tremendously.

Is there anybody using macCatalyst with multiple scenes or it's only good for simple, one window apps?? No documentation, no way to change anything scene related, unless you dive into AppKit, it looks like it's a waste of programmer's time :(

Here's the settings from my project, no macOS deployment target at project level.