While this forum is generally aimed at community support and advice for the use of Cloud SQL, I agree that there does not appear to be any obvious email point of contact for this on the web page. We may be able to forward your questions/concerns to the appropriate team. For this, we'd need a little more detail.
- What specific questions do you have about Cloud Certifications?
- I currently see 3 professional offerings: Cloud Architect, Data Engineer, G Suite Administrator. Are your questions specific to any of these 3 certifications?
- Have you reviewed the FAQ pages of each of these certifications?
With the above information, I may be able to pass these along to the most appropriate individuals to address your issues.