The WARN Act requires notice for mass layoffs. California has additional state level rules. Not necessarily crazy.
Twitter appears to be exceeding both Warn Act and California requirements.
What we don’t know if whether or not Twitter has any established policy (including, for example, “bumping rights”) which Twitter may be violating in this case. I doubt they do, and if that is so this is simply a case of a redundancy lay off for economic reasons and the lady has no case.
WARN act requires 60 day notice.
Musk is having them to continue to receive salary and benefits until Feb 7, three months from now. The wording of the notice is that their employment will cease on Feb 7. They just are no longer allowed access to Twitter facilities or computers.
If she's 6 months pregnant, she will be covered until her due date, and she has the right to buy coverage from Twitter under COBRA.
Musk exceeded the requirements of the WARN act. That requirement is sixty days. He’s paying them until February of next year. That’s way longer than sixty days