Are there any examples Kotlin native drawing a simple UI in windows or Mac? I was contemplating using Kotlin native as an app that downloads the rest of the app which is much larger. I just need to display some text and a progress bar in Mac and windows UI.

I actually have some old code that is exactly what you're describing. It's simple enough to do this in K/N without dependencies, I'll share a github link later.

Cool - I’d love to take a look!

I appreciate the examples! What versions of windows would this work on?

Nothing special is required, it uses only win32 APIs which are available on every version of Windows that will run a Kotlin/Native binary.