How to run the Lead Form Extension in Google ADS?

Question

contextual advertising

In Google ADS I created the extension "Form for potential clients": set up the form, + specified the address and key for the webhook. The form is approved - but there are no impressions of the extension for the second day.
When I created the form, I first indicated brands in the selection fields - they approved it for me with display restrictions because of this. Then I tried to get around this limitation by adding special characters to the brands - they blocked the form due to bypassing the system :)
In general, I decided not to tempt fate, deleted all incorrectly created forms and created a new one, according to the rules, it was approved, everything seems to be fine, but there are no impressions ((.
Has anyone tried to run such forms? How quickly did they start showing up for you? Were there any problems of a similar nature and how did you try to solve them? Please share your experience.