Google GTM + GA4 + InvisionCommunity Member registration form Event

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I'm looking to track specifically a new member registration as an identified "conversion", but am unclear as to how to do that via InvisionCommunity in GA4.

I do see the following in my site's GA4 property Data Streams showing a measurement of "Form interactions" and that data is flowing.

 

I also see the following events but I don't think "form_submit" is granular enough to track the registration alone, i.e. I believe it accounts for login form submission as well?  Any suggestions on how to track specifically a member registration?

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See here: