I'm not sure which forum this even goes in:
We want to send eMails that trigger Siri Suggestions to add an event to a user's calendar. Users buy tickets to events through our website, so we want eMails sent from that website to get those events in the user's calendar automatically.
I don't see a Developer Forum that looks like the right place for this question. Which one should it be?
The best forum section is SiriKit
https://forums.developer.apple.com/community/app-frameworks/sirikit
Not sure how this should work: Opening the mail should automatically add a calendar event without any user interaction? I doubt this is either technical achievable, in alignment with app store policies (without user consent) and what I would like a mail to do as an end-user... Why not go with an .ics attachment and let the user save the event?