NSTextField Changing Focus Order With Tab Key

Question

I have a macOS SwiftUI app that displays a lot of text fields in a grid. Originally I was using SwiftUI TextField's, but they have the problem that you cannot set the focus order of them (the order they receive focus when you press the tab button). I need to change the focus order from horizontal row-by-row, to vertical column-by-column. There does not appear to be an easy way to do this in SwiftUI.

I found a solution for iOS here, that I tried to modify for mac. The problem is that the delegate functions are not getting called. My current code is below. How do I fix this?

Edit: I've updated my code in light of some of the comments, but the problem still remains the same: no delegate methods are being called.

import SwiftUI

struct OrderedTextField: NSViewRepresentable {
    @Binding var text: String
    @Binding var selectedField: Int
    
    var tag: Int
    
    func makeNSView(context: NSViewRepresentableContext<OrderedTextField>) -> NSTextField {
        let textField = NSTextField()
        textField.delegate = context.coordinator
        textField.tag = tag
        textField.placeholderString = ""
        return textField
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(text: $text)
    }
    
    func updateNSView(_ nsView: NSTextField, context: NSViewRepresentableContext<OrderedTextField>) {
        context.coordinator.newSelection = { newSelection in
            DispatchQueue.main.async {
                self.selectedField = newSelection
            }
        }
        
        if nsView.tag == self.selectedField {
            nsView.becomeFirstResponder()
        }
    }
}

extension OrderedTextField {
    class Coordinator: NSObject, NSTextFieldDelegate {
        @Binding var text: String
        var newSelection: (Int) -> () = { _ in }
        
        init(text: Binding<String>) {
            print("Initializing!")
            _text = text
        }
    
        func textShouldBeginEditing(_ textObject: NSText) -> Bool {
            print("Should begin editing!")
            return true
        }
        
        func textDidBeginEditing(_ notification: Notification) {
            print("Began editing")
        }
    
        func textDidChange(_ notification: Notification) {
            print("textDidChange")
        }
        
        func textShouldEndEditing(_ textObject: NSText) -> Bool {
            print("should end editing")
            return true
        }
        
        func textDidEndEditing(_ notification: Notification) {
            print("did end editing")
        }
    }
}