Form Conversion With Facebook Pixel

We are using the Facebook Pixel in CS-Cart and it works well with a conversion for purchases in checkout, but is there a way to track conversions when a CS-Cart form is submitted?

Specifically, this is the form page we hope to track:

Essentially, we want to run Facebook Ads to acquire more vendors to apply to sell on our marketplace. So, by tracking how many times vendors submit this form from seeing our Facebook Ad would be a "conversion". Thus helping define our ROAS on Facebook with the ads to attract vendors.

Any thoughts on this is much appreciated!