You would qualify for a full deduction up to your contribution limit. In your case, there would need to be enough income to cover your IRA.
IRS | IRA contribution limits: Spousal IRAs
If you file a joint return, you may be able to contribute to an IRA even if you didn’t have taxable compensation as long as your spouse did. Each spouse can make a contribution up to the current limit; however, the total of your combined contributions can’t be more than the taxable compensation reported on your joint return. See the Kay Bailey Hutchison Spousal IRA Limit in Publication 590-A.
If neither spouse participated in a retirement plan at work, all of your contributions will be deductible.
See also Deducting your IRA contribution 2022
Reference: Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs)
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