Hi,
Thanks for using our plugins. It is possible to add the categories. I can help point you in the right direction on this, but we are unable to provide the coding for this customization.
First please look over the themer’s guide on how to move templates to your theme for customization.
https://theeventscalendar.com/support/documentation/events-calendar-themers-guide/
This is the file you will want to move to your theme to edit in the list view:
\the-events-calendar\views\list\single-event.php
This file is a good source of how we get the categories and display them:
\the-events-calendar\views\modules\meta\details.php
In that file you maybe able to copy and move to the singe-event one this function:
tribe_get_event_categories
Let me know if you have any follow up questions.
Thanks