Is it possible to open files created with Adobe Illustrator Draw on an iPad directly in Adobe Indesign? Or does this workflow require Adobe Illustrator or Photoshop as an intermediary?
It's only possible to send to Illustrator and Photoshop CC from within the app.
In Id you can open/place the resulting image like you would any jpg, but you'd probably want Ai or Ps for anything other than straight placement. Also, unless you're going to Ai, you're limited to the resolution available on the mobile device.