H4 visa drop box eligibility

Hello All, Please advice if my Wife and Kid are eligible for Drop box or not?
My H1b Visa, Wife and kids’s h4 expired in sep 2020 (Just 2 months back).
I got h1b extension approval recently. My wife and kid are in India, and want to come back in USA as soon as possible.
Are they both eligible for drop box?
Major confusion is with kids eligibility as it says that “Both the parents should have valid visa”
Please help.