Hi Thomas!
Thank you for reaching out to us! Let me help you with this topic.
If you assigned custom taxonomies and custom fields to the tribe_events post type, they won’t show up by default in the community add form. You can achieve that, but will involve custom coding.
We have a great article about customizing our templates you should know about > https://theeventscalendar.com/knowledgebase/themers-guide/
You will find the templates for the Community Events add form at /wp-content/plugins/the-events-calendar-community-events/src/views/community/
I hope that helps! Is there anything else I can help you with? Let me know about it.
Best,
Victor