SwiftUI, tvOS - can't focus buttons

I'm trying to create a simple app for tvOS. But I immediately encountered difficulties. At the top I have a tab selection, and at the bottom there is item management.

The problem is that all buttons in HStack are connected into one big button.

So I solved it by adding .plain style to the buttons. But now I have a new problem - I can't focus on my buttons for tab selection.

Here is the code:

struct ContentView: View {
    var body: some View {
        VStack {
            HStack (alignment: .center) {
                Button("tab1"){}
                Button("tab2"){}
            }
            .frame(width: 500) // works when remove
            List {
                HStack {
                    Text("Item 1")
                    Spacer()
                    Button("Button1"){}
                        .buttonStyle(.plain) // added
                    Button("Button2"){}
                        .buttonStyle(.plain) // added
                }
                HStack {
                    Text("Item 2")
                    Spacer()
                    Button("Button1"){}
                        .buttonStyle(.plain) // added
                    Button("Button2"){}
                        .buttonStyle(.plain) // added
                }
            }
        }
    }
}

I would appreciate any help. Unfortunately, there is very little information on the Internet about designing applications for tvOS, which confuses me.