I have subclassed UITabBar and created a custom look and feel for it. On iOS 18, the tab bar appears as expected. On iOS 26, however, a default Liquid Glass-style capsule selection indicator appears behind the selected tab item.
I tried using UITabBarAppearance, including selectionIndicatorTintColor = .clear and selectionIndicatorImage = nil / empty image, but the capsule-style selected background still appears.
Is this selection treatment part of the new default system rendering in iOS 26, and if so, is there any supported way to remove or disable it while still using UITabBar?