It's hard to tell what's going wrong without seeing your actual code. Have you made sure that your tap gesture closure is actually being called? Have you made sure your openWindow statement actually opens the specified window?

I don't have a solution on offer, but I believe this is the project that's being presented in the linked session. If it has the sought after behavior, it should be straightforward to reverse engineer it.

I'm also not 100% sure what OP is after, but it seems to be a window that remains open when opening an immersive space. I only looked into the sample app briefly, but it indeed uses the app's main window for navigation and content presentation, while the immersive space is presented. WWDC sessions seem to promote the full space only as an immersive experience, so I wasn't aware that this is even an encouraged use case.

You could take a look at this page.

Double check Xcode->Settings...->Locations->Advanced...->Build Location must not be Legacy. I'm on Xcode 15.1 and for me, this wasn't set to Legacy. However, there's also File > Project Settings… > Advanced… > Build Location and that was set to Legacy. Changing it to Xcode Default and reloading the project helped.

Thank you for the quick response. It's not the answer I was hoping for, but one in line with what I expected. We consider the choice of turning on video effects a user decision, not an app decision. This is a decision I can understand being made by Apple which I don't necessarily disagree with. However, I believe there should be two improvements made: Allow users to grant entitlement-based permission to apps to make the right decision for them. This leaves the ultimate decision with the user, while the app can optimize for its specialized use case. Allow apps to opt out of system video effects. Any app that needs to be in complete control of any effects applied to its video input and output to deliver its core feature needs this. It can't be in Apple's interest to add to the frustration on user side and developer side with the current landscape of especially video call software where every party involved is able to apply their own video effects and mostly does so on an opt-out basis. It does not lead up to any kind of "It just works" UX.