I’m a Scoutmaster and Admin and when creating/modifying an event, I can make the event a Repeating Event. I also have the option at the bottom to Copy New, to create a new event using the details of an existing event.
Another Admin who is an Assistant Scoutmaster cannot do this. There is no reason to restrict these features on anyone who has access to create events.
I don’t know if this is a design bug or a programming bug.