As you can see
here, the verification process can take several weeks after undergoing several clarification questions and re-submissions from Trust & Safety - API team.
Usually, Trust & Safety API team will make proper follow up through email(project Owner's email) from '
api-oauth-dev...@google.com'. You need to make sure that your email filters aren't blocking the emails from the Trust & Safety API team. I would further recommend you to check your Spam folder and see if you can find something regarding the emails from the above mentioned sender.