Why is the test synchronization not working?
Notion Automations will pull your Google Calendar events from +/- 7 days and create their matching entries in your Notion database to test the synchronization in the last step of the setup.
If you click on Test synchronization and nothing happens, see if you get this warning:
You don't have any valid event in the next 15 days on "email@address"! Create a new event on Google Calendar and try again :)
In this case, your calendar has no valid event that Notion Automations can extract for the next 15 days. You will need to create an event to test the synchronization and complete the setup.