Passing nested form count in querystring

I’m using the Gravity Forms Nested Forms add-on by Gravity Wiz, and setting up a form essentially like this:

Is there a way to get the count of the nested form entries and pass it via querystring to the redirect URL?

I know this question is probably better asked of the add-on developer, but they’re closed for the next 3 days and I’m in a bind…

I think this documentation covers it:

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