The only way to know for sure is to wait after severance runs out and file a transfer to the new company.
If USCIS denies your application, then the 60 day clock starts the moment you stopped working (for Twitter laid off folks, this has already started).
If USCIS approves your application, then the 60 day clock begins the moment you stopped being an employee of the company (for Twitter laid off folks, this is January 4).
If USCIS denies your application, then the 60 day clock starts the moment you stopped working (for Twitter laid off folks, this has already started). If USCIS approves your application, then the 60 day clock begins the moment you stopped being an employee of the company (for Twitter laid off folks, this is January 4).