Gebru has a history of using her considerable social media following to bully people she has minor disagreements with. This alone would practically warrant anonymity to make sure the reviewers do not get doxed by her.

Blind peer review should be pretty obvious to anyone from an academic background anyway. Asking for reviewers names from a publisher would be an outrageous request.

Was this a Google internal blind peer review? It sounds more like management pushing back for management specific reasons. I'm not sure it's the same thing, or that management should expect to be able to roadblock publication at the last minute without working with the authors directly.