I’ve created maybe a dozen Meetups in the past using the Companion App, however today I somehow created two identical Meetups. I cannot find a way to delete one of the duplicate Meetups, because there doesn’t seem to be a way in the Companion App to do this.
Glad you asked, I had the same problem. So, in the first screen you pull up there is a square with a pencil graphic on the upper right hand corner. Select that and it takes you to screen where you can delete it.