Method for present VoiceShortcutViewController and update UI, full project https://github.com/neungnarakjung/CookBook-Siri-Shortcuts-Example

ViewController.swift

import UIKit
import IntentsUI

class ViewController: UIViewController {

    private var shortcutManager: VoiceShortcutManager?
    private var dataManager: CookBookDataManager?
    
    private func presentVoiceShortcutViewController() {
        guard let shortcutManager = shortcutManager,
            let recipe = dataManager?.getRecipe("foo") else {return}
        let cookBookIntent =  CookBookIntent()

        cookBookIntent.recipe = INObject(identifier: recipe.identifier, display: recipe.name)
        guard let shortcut = INShortcut(intent:cookBookIntent) else {return}
        if let voiceShortcuts = shortcutManager.voiceShortcuts,
            let shortcut = voiceShortcuts.first {
            let editSiriShortcutVC = INUIEditVoiceShortcutViewController(voiceShortcut: shortcut)
            editSiriShortcutVC.delegate = self
            present(editSiriShortcutVC, animated: true, completion: nil)
        } else {
            let addSiriShortcutVC = INUIAddVoiceShortcutViewController(shortcut: shortcut)
            addSiriShortcutVC.delegate = self
            present(addSiriShortcutVC, animated: true, completion: nil)
        }
    }

    fileprivate func updateVoiceShortcuts() {
        shortcutManager?.updateShortcut{ [weak self] in
            self?.updateAddEditButton()
        }
    }

    private func updateAddEditButton() {
        DispatchQueue.main.async { [weak self] in
            guard let strongSelf = self else {return}
            if let voiceShortcuts = strongSelf.shortcutManager?.voiceShortcuts,
                voiceShortcuts.first != nil {
                strongSelf.updateTitleForEdit()
            } else {
                strongSelf.updateTitleForAdd()
            }
        }
    }
}