The Liquid glass blur effect does not show over the UITabBar as content scrolls underneath.

In iOS26, when using a standalone UITabBar without UITabBarController, the liquid glass blur effect is not applied when scrollable content moves behind the tab bar. However, the blur effect appears correctly when using UITabBarController.

Sample Screenshots:

When using UITababr

When using UITababrController

Sample Code:

class SimpleTabBarController: UIViewController, UITabBarDelegate {
 
    let tabBar = UITabBar()
    let redItem = UITabBarItem(title: "Red", image: .add, tag: 0)
    let blueItem = UITabBarItem(title: "Blue", image: .checkmark, tag: 1)
 
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
 
        tabBar.items = [redItem, blueItem]
        tabBar.selectedItem = redItem
        tabBar.delegate = self
        tabBar.translatesAutoresizingMaskIntoConstraints = false
 
        let tableContainerView = TableContainerView()
        view.addSubview(tableContainerView)
        tableContainerView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            tableContainerView.topAnchor.constraint(equalTo: view.topAnchor),
            tableContainerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            tableContainerView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            tableContainerView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
        
        view.addSubview(tabBar)
 
        NSLayoutConstraint.activate([
            tabBar.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            tabBar.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            tabBar.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
    }