GA4 custom event parameters

Is it possible to add custom even parameters when using GA4 with Zaraz? I see the option to specify the event name but don’t see the Even Parameters sections like GTM would have available.

You should be able to add any custom parameter by going to your GA4 action, clicking “Add field” and then choosing “Add custom field…”.

There is no option for “Add field” in the add action menu.

I’ve found the option to add custom fields appears after the action is created and you edit it.