Hi Alex,
It should be doable but customizations like this are not something we can spend time on at the moment. Mainly you’re going to want to modify /wp-content/plugins/events-community/views/event-form.php (first making a copy and placing in an ‘/events/community/’ folder in your theme). You can see how some of the other fields are included in the file and it would just be a matter of duplicating these fields but then customizing them with whatever other fields you want to use.
If you come up with anything it’d be great if you could share because I’m sure others could benefit from this!