This Jitsi Calendar add-on developped by the Jitsi Team is directly integrated in Google Calendar and you can choose directly a between Google Meet or Jitsi Meet.
The Google Calendar add on was developped to replace the Chrome Extension right ?
It would be awesome to just add one option that is missing in my opinion:
choosing a custom meeting server
Below an example, in red the add-on where we can change between Google Meet or Jitsi Meet.
And in blue, the chrome extension that add only the meeting link in the description