No, you would either need to file jointly or separately, but not both. If she is adamant about filing Married Filing Separately, you will need to do likewise. Since she itemizes her deductions, you will need to do the same even though your Standard Deduction may be more than your itemized deduction.
Keep in mind, California is a community property state, so both of you will need to file in accordance to community property rules. Please read this TurboTax article for more information.
[Edited 03/20/22|11:01 am PST]
@huyclef
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