Hey @dcantato! I just want to note that we are fairly limited in how much support we can offer in regards to customization. With that said, I’m happy to point you in the right direction (if I can).
The ability to set related events by distance is not an out-of-the-box feature. Our plugin documentation is a great source of information for adding this kind of functionality. Another area I’d explore is your plugin folder, more specifically events-pro/src/views/pro/related-events.php – this is where you’ll find the Related Events code displayed on single-event.php.
If you’d like to recommend this feature added to an upcoming release, you can do so here. Thanks for choosing Events Calendar PRO and we hope you’re having a great holiday season!