Hi @JMR197,
You could add Condition under to trigger to check if the event is new added, updated or deleted.
If the the event is new added, create a new event in google calandar.
If the the event is updated, update the event in google calandar.
And if the event is deleted, delete the event in google calandar.
The screenshot of the flow as below:


Please make sure:
1.The Title of task in Google calandar would always be same with the Subject of task in Outlook calandar.
2.The Title of task in Google calandar and the Subject of task in Outlook calandar would always be unique.
Best regards,
Alice