Hi, Sarah.
Thanks for your detailed question.
Yes because when a visitor is logged-in when they create an Event, Organizer, or Venue via the Community Events form, they are assigned as the author of that event in the WordPress database.
A logged-in user’s list of created Events is available at your-site-com/events/community/list/, which pulls the Events of which they are the author.
If an Event was created by an Anonymous submission, their account won’t be the author and therefore won’t show up in their your-site-com/events/community/list/ if they do later create an account.
I hope this clears things up. Let me know if you have any follow-up questions.