Customizable Toolbar on iPadOS26 seems not customizable

Hi, I have started app development fairly recently and I decided to develop for Apple due to the fact that my school uses iPads and they were so convincing that I decided to buy more Apple products adding to the experience with the iPad such as a Mac where I learned Xcode, Swift and SwiftUI as far as I could comprehend.

I am working on a document based app for my school and I want to implement a toolbar that’s user customizable. There seems to be no way to get a customizable toolbar running on iPadOS26 though iPadOS16 has supported this feature and it has been till 18, I believe. I have set up a doc-based app in Xcode and that and all of its views do work except the toolbar that I added to my NavigationSplitView. The items show, when their defaultCustomization isn’t set to .hidden. The toolbar is given an id and the items are all wrapped in the ToolbarItem structure that also is given an id and the placement of .secondaryAction. The items show up and behave as expected in terms of grouping and making space if there isn’t enough room for all items so some appear in the overflow menu. From apps like Preview, Reminders and MindNode I know that the customization is supposed to still be available but it lives in the menu bar, where I haven’t seen it under view. It seems like there is a thing that my toolbar does not conform to or that there is a method that‘s called, when the user wants to customize the toolbar that I don’t know about. I would much appreciate a quick fix, solution or suggestion.

I would like to add that I have watched multiple developer videos about the toolbar including 2025 videos and those from early ipadOS16 stages and many things differ from the documentation for SwiftUI.

Customizable Toolbar on iPadOS26 seems not customizable
 
 
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