I am trying to create a dynamic item page from an App Collection for public members data, but it won't allow me to

Question:
I want to create a dynamic item page from an App collection for public members data but it won’t allow me to

Product:
Wix members area, public app collection

What are you trying to achieve:
I want to create a dynamic item page from an App data Collection which is currently locked out of use

What have you already tried:
everything apart from code

Additional information: