First, select what you want to save in the OneNote UWP.
Then, in Gem Menu for OneNote UWP, click “Gem” menu -> “Save as” menu item.
In the Save As window, choose the “Save as type” as Word Document, and enter the file name.
Click “OK” button, Gem Menu will save as Word Document.
Because WordNote is a manager of Word document, you can view the .docx file saved under the WordNote notebook folder.