The equivalent of using a .semanticGroup accessibilityContainerType in UIKit, would be to use the .accessibilityElement(children: ) modifier with the .contain option in SwiftUI. Here's a refresher with some use-cases: https://x.com/dadederk/status/1558790851496742914

Creating UIAccessibilityElements, combined with a semanticGroup accessibilityContainerType, can also help you make components as complex as charts accessible. Example from "Bring Accessibility to Charts" WWDC21: https://developer.apple.com/videos/play/wwdc2021/10122/

Here's a few examples where Apple seems to use the semanticGroup accessibilityContainerType, other than for the tab bar and toolbar, to serve for inspiration on when it might be useful in your own apps. Reminder that this configuration causes for VoiceOver to announce the accessibility label of the container view, before what it would normally announce for an element, only when the focus moves from outside to inside the container.