How to delete Navigation Link > symbol in SwiftUI?

Chevron image of link is injected by List for automatically detected NavigationLink. This is default behavior of List.

The possible solution is to replace NavigationLink inside List with Button and activate NavigationLink programmatically.

Here is a demo of approach. Tested with Xcode 12.4 / iOS 14.4

struct Message: Identifiable, Hashable {
    let id: String
}

struct ContentView: View {
    let messages = [Message(id: "1"), Message(id: "2"), Message(id: "3")]
    @State private var tappedItem: Message?

    var body: some View {
        NavigationView{
            List{
                ForEach(messages) { item in
                    Button(action: { tappedItem = item }) {   // << activate !!
                        Text("Message \(item.id)")
                            .padding(.vertical,3)
                    }
                }
            }
            .background(
                NavigationLink(destination: Text("MessageDetailView \(tappedItem?.id ?? "")"),
                    isActive: Binding(
                        get: { tappedItem != nil },         // << handle !!
                        set: { _,_ in tappedItem = nil }
                    )){
                    EmptyView()
                }
            )
        }
    }
}

You should not use List in this case:

import SwiftUI

struct ContentView: View {
    
    var body: some View {

        NavigationView{
            
            VStack {
                
                ForEach(0..<10) { item in
                    
                    NavigationLink(destination: Text("some text here!")){
                        
                        HStack { Text("Link " + item.description); Spacer() }.padding(.horizontal)
                        
                    }
                    
                    Divider()
                    
                }
                
                Spacer()
                
            }
            .navigationTitle("Hello World!")
            
        }
    }
}