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Why are all "View As" phone devices now the same exact size class?

I updated XCode a few days ago, and now I’m noticing that when I click on a given mobile device in the “View As” menu, no matter which phone I click on - they are all wC hR size class.

What is going on here? I can’t use Vary for Traits for the iPhone if every single phone has the exact same size class/traits. What is going on here? I’m completely confused right now. Please help.

No, response? At all?