Why can't I see any Facebook custom conversions if my form is redirected to a custom Thank You page upon submission?
If your form is redirected to the custom Thank You page within an iframe, one of the following cases may apply:
Case 1: If it is redirected in the same window, configure the rule such that the custom conversion URL contains https://forms.zohopublic.com/, as shown.
Case 2: If it is redirected in the parent window, configure the rules such that the custom conversion URL equals the custom Thank You page URL and the Referring Domain contains forms.zohopublic.com as shown.
Case 1: If it is redirected in the same window, configure the rule such that the custom conversion URL contains https://forms.zohopublic.com/, as shown.
Case 2: If it is redirected in the parent window, configure the rules such that the custom conversion URL equals the custom Thank You page URL and the Referring Domain contains forms.zohopublic.com as shown.