My Siri was turned off!!!! I had to turn it on and then say "hey, Siri" three times and then ask a couple of questions before it said my Siri was "set up." Bloody hell!!!!! I NEVER had to do anything like this before that I recall.
The access whilst locked was already turned on, though, so I have no idea why Siri did not respond. It seems to turn on now once I say "hey, Siri," but it does not say anything unless I ask a question. As I recall, it used to say something as soon as I said "hey, Siri."
I just checked again for an update to OS on my computer, and it says 12.2.2 is the current version. I have no idea what is going on anymore. I totally screwed myself over by downloading this OS on my iphone.