Think you would have to request the filings in California. You can view the list of warnings without a request of which you can find the numerous Google listings on Jan 20[1], but details I don't believe are published publicly.

Follow the link, click latest listings for 2022-present, and it should open a spreadsheet in chronological order.

[1] https://edd.ca.gov/en/jobs_and_training/Layoff_Services_WARN...