Do I need to file federal before state (California, FTB)? Will I have enough time to file state taxes by 10/16/23?

There's a few things I need to figure out before filing my federal taxes. I've gone through the state taxes on the FTB site, and I'm close to filing that. Do I need to file federal taxes and get it accepted/approved by IRS before I file my state taxes through the FTB site? It takes about 24-48 hours to get it accepted by IRS, so do I have time to file my state taxes by the extended deadline of Monday 10/16/23? I'd rather file it earlier, though, in case there are any problems.