How to Sync Multiple Calendars Using Google Calendar
Best answer by Liz_Roberts
Checking in to make sure you were able to get your Zap up and running! If you are running into any issues, just let us know
I see you were working with Support on this and am posting their response below in an effort to assist other users who may have a similar workflow:
Currently Zapier does not support two-way syncing between apps. Think of Zaps like one-way workflows. This help doc has some more info:
Instead, Zaps have one trigger (when this thing happens) and one or more actions (then do this other thing). So it's possible to have a trigger with one app and then send data into another app, a one-way flow of data.
In order to do a two-way flow of data, you would need a separate Zap. This may accidentally create Zap loops, so proceed with caution here!