On Mac the steps are like this.
First, select note you want to share and click "Share Note"
Next click on "Invite with Link".
After that in "Create Link" dialogue enter "hi@kiwi.page" email and press "Copy Link".
New in your Kiwi Page Dashboard click "New Note".
Enter Apple Note Link that you created before and press "Save".
Wait 30 seconds or so and you will be redirected to the public URL of your newly published note.