I can confirm what you are seeing.
I have a v3pro watching the front yard. The routine with Alexa is simple. If the camera detects a person announce “A person is in the front yard”. I just tried it and:
Alexa was quiet
I received a Wyze notification that “Ron was detected in the front yard”.
I received a Descriptive Alert that Ron was in the front yard and what I was wearing.
I double checked the Alexa routine and clicked on the “try it” arrow and Alexa announced as expected.
I checked the v2 doorbell 2 feet below the v3pro. It did exactly as expected. I received a Wyze notification and Alexa made the expected announcement.
I checked the Alexa routine history. The doorbell was there, the v3pro was not.
So it was either Wyze did not send or Alexa did not receive and since we just updated Wyze I agree with you. Probably Wyze.