MOdx. You need to check the functionality of the forms. What are the options?

Question

MODX

https://ulybkasveta.ru/torshery/torsher-01736-2.6-... here is this site. There is a task to check work of forms. I checked the callback order and found it. But I can’t find a one-click purchase and quick clearance. What are the validation methods? Where can the handler be? That "one click" and "quick order" is not an ajax form, so I can't find it. Already the whole brain is broken.

Answer 1

Which snippet calls the form? And through a snippet?