It seems that UITabAccessory creates its own constraints. What are the dos and don’ts in terms of constraints within the accessory view for iPhone Duo ?

For it to work correctly on iPhone Duo in all poses, is the best practice to size the contentView of UITabAccessory to override intrinsicContentSize with width set at UIView.no IntrinsicMetric and height set to a relevant value ?

In the iPhone Duo horizontal pose full expanded inner screen, we use UITabBarController (set up using the viewControllers property), and the UITabBar is still horizontal when it should be vertical ? What are the best practices to make it always adaptable in all poses ?

When the inner screen on iPhone Duo is partially folded and horizontal, what is the best practice to make the UITabAccessory adapt ? How to make it shift to the left or to the right screen and how to size it properly in that case ?

We are currently adapting our app to Liquid Glass. It's mainly written with UIKit. One of the questions is about the tab bar. We advocate the business to go with Apple's recommendation to display it at the top with only labels on iPad. The question now is this: on iPhone Duo, in the inner screen, in Portrait mode, where is the tab bar displayed ? We know from the Tech Talks and Human Interface Guidelines that is is the only pose when it's horizontal (as opposed to vertical on the side). But is it displayed at the top like on iPad (with only labels) or at the bottom like on iPhone (with icons and / or labels) ?