If you both make deductible traditional IRA contributions and your desire is to have money in Roth IRAs, you would both have to convert. You only need one deductible $6,000 contribution for 2022 to reduce your 2022 AGI below $68,000, so unless you have another reason to move an additional $6,000 of income from 2022 to a later year, there is no reason to have two $6,000 deductible traditional IRA contributions for 2022.
