I recently acquired Google Cloud Professional Developer certification, the content was quite broad but went deep enough that you can hold your own in customer and delivery conversations.
You essentially have Foundational, Associate and Professional examinations, if you're coming from a place with pre-existing knowledge in a cloud platform, I would aim straight for a professional qualification. The Professional Architect seems to be the most in demand.
There is also a course specifically tailored for AWS professionals which might be of interest to someone with your background:
https://www.coursera.org/learn/gcp-fundamentals-aws