Not in my experience, unfortunately. The reps we got with GCP could give us advice, but no real powers to push stuff or solve problems, it felt more like L1 support. As described bellow, maybe it depends on a company size and/or a country.
our account manager definitely opened doors for us and got us in touch with experts that could solve our issues.
150 sized company in a small EU country.
We have a silver enterprise contract.