Something sounds fishy...
There is no requirement in the Fair Labor Standards Act (FLSA) for severance pay. Severance pay is a matter of agreement between an employer and an employee (or the employee's representative).
There is no law in California requiring employers to offer severance packages. An employer is only obligated to give you severance pay if you have a previous agreement to receive it. For example, there may be a severance pay clause in your pre-employment contract, or your union agreement might mandate it.
Is Musk lying?