Digital Forensic Help Needed

I am looking for someone who has an in depth knowledge of digital forensic tools and techniques to help me obtain useful information about emails sent from a shared google email account. In particular, this task involves looking at email message headers or other information from the shared gmail account, most of which do not work in the Google Admin Toolbox I think possibly because they were sent from an Iphone and/or Apple Mac laptop.

Ideally, I need remote assistance on my laptop so we can work through the issues on my laptop and go through my files.