https://www.youtube.com/watch?v=wnrtI4qXghc

DatePickerTextField.swift

import SwiftUI

public struct DatePickerTextField: View {
  /// Config
  var components: DatePicker.Components
  @Binding var date: Date
  var formattedString: (Date) -> String
  /// View properties
  @State private var viewID: String = UUID().uuidString
  @FocusState private var isActive

  public init(
    components: DatePicker.Components = [.date, .hourAndMinute],
    date: Binding<Date>,
    formattedString: @escaping (Date) -> String
  ) {
    self.components = components
    self._date = date
    self.formattedString = formattedString
  }

  public var body: some View {
    TextField(viewID, text: .constant(formattedString(date)))
      .focused($isActive)
      .toolbar {
        ToolbarItem(placement: .keyboard) {
          Button {
            isActive = true
          } label: {
            Text("Done", bundle: .module)
          }
          .tint(Color.primary)
          .frame(maxWidth: .infinity, alignment: .trailing)

        }
      }
      .overlay {
        AddInputViewToPicker(id: viewID) {
          /// SwiftUI Date Picker
          DatePicker("", selection: $date, displayedComponents: components)
            .labelsHidden()
            .datePickerStyle(.wheel)
        }
        .onTapGesture {
          isActive = true
        }
      }
  }
}

fileprivate struct AddInputViewToPicker<Content: View>: UIViewRepresentable {
  var id: String
  @ViewBuilder var content: Content
  func makeUIView(context: Context) -> some UIView {
    let view = UIView()
    view.backgroundColor = .clear

    Task { @MainActor in
      if let window = view.window, let textField = window.allSubViews(
        ofType: UITextField.self).first(where: { $0.placeholder == id }) {
        textField.tintColor = .clear
        /// Converting SwiftUI View to UIKit View
        let hostView = UIHostingController(rootView: content).view!
        hostView.backgroundColor = .clear
        hostView.frame.size = hostView.intrinsicContentSize

        /// Adding as InputView
        textField.inputView = hostView
        textField.reloadInputViews()
      }
    }
    return view
  }

  func updateUIView(_ uiView: UIViewType, context: Context) {  }
}

fileprivate extension UIView {
  func allSubViews<T: UIView>(ofType type: T.Type) -> [T] {
    var resultViews = subviews.compactMap({ $0 as? T })

    for view in subviews {
      resultViews.append(contentsOf: view.allSubViews(ofType: type))
    }

    return resultViews
  }
}

#if DEBUG
struct ContentView: View {
  /// View properties
  @State private var date: Date = .now
  var body: some View {
    NavigationStack {
      DatePickerTextField(date: $date) { date in
        return date.formatted()
      }
      .navigationTitle("Date Picker TextField")
    }
  }
}
#endif

#Preview {
  ContentView()
}