NSTextField Changing Focus Order With Tab Key - swift

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")
}
}
}