multiple window layout?

Hi there, we are exploring the new layouts for our app on Vision OS. We figured that the tab overview New Safari provides is pretty amazing. it doesn't looks like it is created through opening mulitple windows since all the tabs that displayed cannot be resized. Also the little curve that all this tabs formed gives user a nice surrounding feeling. Wondering is this multiple window style achieved?

How can we achieve this multiple window style layout inside our own app?

Looks a lot like an ornament to me.

multiple window layout?
 
 
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