Navigation bar color ios15

Question

I have problem with changing navigation bar color in iOS 15. In AppDelegate I'm setting UINavigationBarAppearence like this:

let appearance = UINavigationBarAppearance()
appearance.configureWithOpaqueBackground()
appearance.shadowImage = UIImage()
appearance.shadowColor = .clear
UINavigationBar.appearance().standardAppearance = appearance
UINavigationBar.appearance().scrollEdgeAppearance = appearance

In my application, I need to change navigation bar color in multiple places in multiple colors.

Previously, just setting self.navigationController?.navigationBar.barTintColor = .yellow

did the trick but not anymore. Every time when I need to change navigation bar color, do I need to change whole UINavigationBarAppearence class attributes? If yes, it seems like a bit overload. But I cannot find better solution. Others methods like

self.navigationItem.setHidesBackButton(true, animated: true)

dont work anymore too. Instead

self.navigationController?.navigationBar.topItem?.setHidesBackButton(true, animated: true) 

only works. All these change just seems very confusing.