I've had to do it as a leader...hundreds laid off. I flew around the globe and had a lot of face to face meetings.
Orchestrating 400ish one on ones via Zoom wouldn't have been that much effort. I assume they could have spread it across several leaders.
Edit: From their careers page..."while prioritizing a culture that celebrates diversity, inclusion, and integrity"
Work everyone hard until that last day. Do it on the last day of the month so they have no health insurance the next day.
Been there.