Really? Did you require any non-engineers to be in the loop before launching the features? Were these public facing changes?
Netflix barely had any PMs. Almost all Netflix features are pushed without a PM being involved in any way.
Depends on which part of the company you're talking about. The studio engineering side has many PMs.
Having said that, both Google and Amazon has excellent PMs and there are teams that require PMs to be in the loop for a feature launch but it is not universal.