The Marketing91 page is gone, but a 410 Gone response means more than a 404....

https://deansmasterjournal.hexaforgey.com/posts/how-to-connect-google-ads-to-ga4-the-right-way

The Marketing91 page is gone, but a 410 Gone response means more than a 404. Learn what the difference means, how to find useful alternatives, and practical steps for vetting a Google Ads specialist before you hire.