Budget: 2000 UAH Deadline: 1 day
Gennady, if Google Analytics sees purchases, the problem is most likely in the data transmission through GTM or in the Conversions API setup, which is causing Meta to filter out duplicates or not receive the Purchase trigger at all.
I will check the tag settings and the transmission of purchase parameters so that the Meta Pixel and Conversions API receive correct data, and you can see the accurate return on ad spend.
Are you using Google Tag Manager to transmit events to Meta, or is the Pixel embedded directly in the site code?