Recommendations for image matching with a dialog box?

[JMichaelTX]

@coppit

It comes from the Draw.io app, which I think is basically a webpage hosted inside an app Window. i.e. The dialog isn't a real window.

Well, let's find out how much we can learn about this window.
Try running this script, and see what window elements it finds:

Front Window Analysis Tool for System Events

and post the results here in a Code Block.