Stop Auto-Add Calendar Events in GCC

Greetings,

My organization is using the Outlook Web App only, on an Office 365 G3 GCC license. I'm trying to figure out a way to stop Calendar Invites from automatically adding to the calendar. I know on a regular enterprise M365 license you can do it in the OWA/Settings/Calendar/Events from email settings, but with the G3 license there are no options on that screen at all:

Is there a way, in Powershell, the admin console, GUI, or anywhere, to turn off the automatic addition of calendar invites to the calendar in the government tenants?

Thanks!

Jason