Hey Don,
There isn’t anything “between” a Webflow-generated HTML form and a custom action target. Your form submissions get captured by your browser and sent to the action URL. Check the HTML itself and you can see what it’s generating.
If you’re asking the community to help, you’ll need to share the published page with the form you’re having problems with, and your designer readonly link for that page as well, with instructions on how to find it, what data you’re testing, any scripts you’re running, anything else relevant.