How to set up and use Personal Voice and Live Speech on iPhone and iPad
Siri - Apple
Set up your iPhone or iPad - Apple Support
Find out what Siri can do on iPhone - Apple Support
Run shortcuts with Siri, the Shortcuts app or Siri Suggestions – Apple Support (AU)
About Sign in with Apple - Apple Support
Siri: Everything You Need to Know - MacRumors
See who has access to your iPhone or iPad - Apple Support
Shortcuts User Guide - Apple Support
Use Siri on all your Apple devices - Apple Support