I had trouble doing this — maybe I used the wrong steps — but I could not create another menu item with the same name in the routine way.
However, someone from the Facebook group suggested something that worked for me. Namely, create a custom link to the URL of the parent page, name it the same as the parent page (this worked), and then place the custom link in the top of the child page list. So far so good.
Thanks for taking the time to offer help.
Larph