SwiftUI Remove NavigationBar Bottom Border

I have also met this problem. Here is the almost similar post

But most of the answer had side effect. And for me, the best solution was this

UINavigationBar.appearance().barTintColor = .clear
UINavigationBar.appearance().backgroundColor = .clear 
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
UINavigationBar.appearance().shadowImage = UIImage()

and also want its important to set UIImage() not 'nil' to shadowImage and bacgroundImage. And I made navigation displayMode inline

.navigationBarTitle(Text(""), displayMode: .inline)

In the initializer of your View you can set the appearance of your navigation bar. There you have to set the .shadowColor property to .clear.

init() {
    let appearance = UINavigationBarAppearance()
    appearance.shadowColor = .clear
    UINavigationBar.appearance().standardAppearance = appearance
    UINavigationBar.appearance().scrollEdgeAppearance = appearance
}