And I have another related question - I didn't find the api to check if Siri enabled or not at user's end(like if Siri is enabled on their phone), is it because this information is not shared with the app? Thanks.

It's a custom intent.

Thanks for the reply! Should the status always be authorized if I only want to use shortcut by siri? It seems in my app, I can still use shortcut by calling siri even if the status is .denied, is it as expected? However, when the status is .denied, every time i want to use the sirikit feature, siri would pop up a dialog(totally automatically, and every time) saying "I'll need to access your app data to user the app. Is it ok?" and that sirikit feature only be available when I tap Allow or toggle the Use with Siri Requests to on. I tried to call the requestSiriAuthorization(_:) in the app but nothing pops up on the screen.