The company runs residential cleaning across a US metro area and gets most of its new customers through Google Ads. When I started, Google Ads was reporting conversions that nobody in the business could tie to actual bookings. The owner was spending on campaigns because the numbers looked fine, not because the jobs were coming in.
GA4 had been set up by the previous web developer. Ecommerce reports were empty. The booking tool sat in an iframe and the thank-you page was the same URL as the form page with a query string.