i have found nothing in my usage to suggest that current Siri can reliably open a garage door. Or do anything else - it’s actively worse than 5 years ago.
A few major iOS releases ago when you said “Hey Siri, wake me up in an hour”, it correctly set an alarm in now() + 60 minutes. Nowadays if you don’t say an absolute time, it sets a timer instead of an alarm. I used relative times when taking naps so this regression is a UX change for worse for me.