We have implemented this extension: Tags and Custom Fields Boom for Google Calendar extension

It will assist you in an easy, friendly manner to add all the info and details of your event to your calendar event in an organized way through custom fields. Many other features coming soon.

Install it directly through the link: https://chromewebstore.google.com/detail/tags-and-custom-fields-bo/hlopkmaehodajggidebkjcbfodnlfeml

And here's a tutorial video: https://youtu.be/ucRcxFYJhaQ?si=2U0tJAz7QgYyLgSx