Did you mail the fed & state returns separately to the correct addresses for each of them ?
Fed : https://www.irs.gov/filing/california-where-to-file-addresses-for-taxpayers-and-tax-professionals
CA : https://www.ftb.ca.gov/help/contact/mailing-addresses.html
If you did then all you can do is WAIT patiently for the IRS to catch up on the 11 million + envelopes that piled up during and after the covid shut down ... expect a mailed in return to take much much longer than the usual 6 weeks. Check the IRS site one a week until you see your return is in the system. https://www.irs.gov/refunds
