Both can be true. They're even complementary I'd say: the DEI policies are like social greenwashing for how poorly they treat their employees.
FWIW: I’m Black and I found some of the things that were suppose to trigger me or some of the “green washing” that were suppose to give me a warm and fuzzy eye rolling.
To be clear, I had a customer facing role (AWS Professional Services). Amazon wasn’t about to send anyone incompetent to talk to their large clients I don’t care what kind of initiatives they had.