Hi Doctor,
It isn't (yet) possible to enter swing information in the iPad app, although you can do it in the desktop version of Notion. The folks at Notion tell us that their long-term goal is to add all or most of the desktop capabilities to the tablet app, and they are supplying a steady stream of upgrades that fulfill this promise one step at a time.
The good part is that if you create a score in the desktop version of Notion and transfer it to the iPad, everything plays back, including things like swing and all the other stuff that's not yet available on the iPad.
You should take the time to write a feature request and email it to Notion. If a feature is requested a lot, it tends to get bumped toward the top of the to-do list. The email address is
support@notionmusic.com.
Best wishes,
Thorrild