Yes you do need to add the W-2 for your wife.
Regardless of the amount on your wife's W-2 the IRS receives a copy of the information and will be looking for the W-2 to be included on your personal tax return.
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Every 2019 W-2 that you received must be reported on your 2019 tax return, even if they are for small amounts. Remember that each one of those W-2’s has your Social Security number on it, and that income was reported to the IRS by the employer. You do not want to get in trouble with the IRS for under-reporting your income.
ALL of your W-2’s must be entered on the SAME tax return. After you enter the first one, you click Add Another W-2.