Nested content pages?

Hello,

Is it possible to have content page inside another content page?
I have a page Group.php it is accessed via /group/:group where :group is a variable this works.

In that page i want to keep a sidebar and load a forum.php
I created the content page and looks ok in wappler.

But what should the path be? I am thinking /group/:group/forum

However NO matter what i put the ROUTES are not updated.