Calendar Availability Settings when using Outlook on Mac

Hello team,

Looking for some help with calendar settings when using Outlook. I created a sports property calendar, and for users utilizing Outlook on Mac it is showing their meeting availability as busy during the day of a sport event.

The event’s aren’t timed and appear as headers in Outlook - does anyone know how to set the default settings to not show as busy during these events without manually setting each topic as available?

Any help would be greatly appreciated!