> You are not privy to either the list of employees who were let go or their historical performance reviews

I know this local to my org. I can say first-hand that most low performers from the current and prior cycles were not impacted by the layoffs, while people who were high performers in the current and/or prior cycles were impacted by the layoffs. The experiences of other people managers within the company (and at Amazon and Microsoft) agree with this.

I don't want to get too into Kremlinology, because I don't have enough data to say for sure how people in my org were selected beyond "performance wasn't a major consideration". But there is definite high-level tilt towards cutting people from certain areas in the company (parts of maps and devices were hit hard, most of cloud was barely impacted).