Hey Julie,
Thank you for reaching out to us!
The functionality you are looking for is provided by Community Events.
Community Events adds an event submission form to the frontend of your website so users can add events to your calendar without needing admin access. Standard event fields allow them to input basic event details, and you can even give them the ability to add categories and tags based on your predefined settings.
You will find more information about Community Events in the following link:
https://theeventscalendar.com/product/wordpress-community-events/
I hope this helps! If you have any other questions at all please feel free to let me know and I’d be happy to help as best I can!
Cheers,
Patricia