What happened in InterfaceBuilder of Xcode 15????

In an app I'm working on, I have a UINavigationController which has a navigation item in a xib file. I see Left Bar Button Items, Center Item Groups and Right Bar Button Items. Under Right Bar Button Items, I have a UIButton. But, in the interface of the xib file, I don't see it, even if I click on it. Further, I can't add anything to the Left Bar Button Items. In a previous version of Xcode, I had been able to put and edit the UIButton but not anymore?

What's going on?

Official reply in Feedback Assistant: this feature was removed in Xcode 14, and it would not be coming back.

What happened in InterfaceBuilder of Xcode 15????
 
 
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