$FocusState and Lists with rows containing TextFields

While I've seen examples of using $FocusState with Lists containing "raw" TextFields, in my use case, the List rows are more complex than that and contain multiiple elements, including TextFields. I obviously don't understand something fundamental here, because I am completely unable to get TextField-to-TextField tabbing to work. Can someone set me straight?

Sample code demonstrating the issues:

//
//  ContentView.swift
//  ListElementFocus
//
//  Created by Richard Aurbach on 10/12/24.
//

import SwiftUI

/// NOTE: in my actual app, the data model is actually a set of SwiftData
/// PresistentModel objects. Here, I'm simulating them with an Observable.
@Observable
final class TestModel: Identifiable {
	public var id: UUID
	public var checked: Bool = false
	public var title: String = "Test"
	public var subtitle: String = "Subtitle"

	init(checked: Bool = false, title: String, subtitle: String) {
		self.id = UUID()
		self.checked = checked
		self.title = title
		self.subtitle = subtitle
	}
}

struct ContentView: View {
	/// Instead of a @Query...
	@State var records: [TestModel] = [
		TestModel(title: "First title", subtitle: "blah, blah, blah"),
		TestModel(title: "Second title", subtitle: "more nonsense"),
		TestModel(title: "Third title", subtitle: "even more nonsense"),
	]
	@FocusState var focus: UUID?

	var body: some View {
		Form {
			Section {
				HStack(alignment: .top) {
					Text("Goal:").font(.headline)
					Text(
						"If a user taps in the TextField in any row, they should be able to tab from row to row using any keyboard which supports a tab key."
					)
				}
				HStack(alignment: .top) {
					Text("#1:").font(.headline)
					Text(
						"While I will admit that this code is probaby total garbage, I haven't been able to find any way to make tabbing from row to row to work at all."
					)
				}
				HStack(alignment: .top) {
					Text("#2:").font(.headline)
					Text(
						"Tapping the checkbox button causes the row to flash with the current accent color, and I can't find any way to turn that off."
					)
				}
			} header: {
				Text("Problems").font(.title3).bold()
			}.headerProminence(.increased)
			Section {
				List(records) { record in
					ListRow(record: record, focus: focus)
						.onKeyPress(.tab) {
							focus = next(record)
							return .handled
						}
				}
			} header: {
				Text("Example: Selector of Editable Items").font(.title3).bold()
			}.headerProminence(.increased)
		}
		.padding()
	}

	private func next(_ record: TestModel) -> UUID {
		guard !records.isEmpty else { return UUID() }
		if record.id == records.last!.id { return records.first!.id }
		if let index = records.firstIndex(where: { $0.id == record.id }) {
			return records[index + 1].id
		}
		return UUID()
	}
}

struct ListRow: View {
	@Bindable var record: TestModel
	var focus: UUID?
	@FocusState var focusState: Bool

	init(record: TestModel, focus: UUID?) {
		self.record = record
		self.focus = focus
		self.focusState = focus == record.id
	}

	var body: some View {
		HStack(alignment: .top) {
			Button {
				record.checked.toggle()
			} label: {
				record.checked
					? Image(systemName: "checkmark.square.fill")
					: Image(systemName: "square")
			}.font(.title2).focusable(false)

			VStack(alignment: .leading) {
				TextField("title", text: $record.title).font(.headline)
					.focused($focusState)
				Text("subtitle").italic()
			}
		}
	}
}

#Preview {
	ContentView()
}