If you'd like to see GoodNotes supported on Windows, we are actually inviting early testers to GoodNotes for Windows!
If you're asking for support on other platforms, we'd love to hear more about the specific devices you use, along with any accessories so that we can understand the full picture.
Feel free to submit what devices you use and any thoughts on this form, we can't wait to read through your feedback and keep you in the loop should there be any future developments.