Hi bblblw,
Users can receive meeting-related messages by turning on the Delegate receives copies of meeting-related messages sent to me option as below:
You can navigate to this section by clicking File> Info> Account Settings> Delegate Access> Add in Outlook.
Then the delegates can be aware of all events related to you. But if they want to receive reminders of your events, they have to create the same events in their own calendars.
Also you can create a shared mailbox as a team calendar. Please refer to this article: Open and use a shared mailbox. But if users want to receive reminders of an event in the team calendar, they need to be invited as attendees.
So basically there is no workaround which can meet your need perfectly. Because the principal of reminder is: only the owner and attendees of the event receive reminders while delegates don't.
Regards,
Henry Huang