CPSC's HTS list gives a product category, not citation codes. These rows of CPSC's citation list mention "infant sleep products" products by name. It is a text match, not a CPSC mapping: you decide which rules apply to your product, and others (for example lead or phthalate limits on children's products) may apply too.
121816 CFR 1218: Safety Standard for Bassinets and CradlesCPC
121916 CFR 1219: Safety Standard for Full-Size CribsCPC
122016 CFR 1220: Safety Standard for Non-Full-Size CribsCPC
122116 CFR 1221: Safety Standard for Play YardsCPC
122216 CFR 1222: Safety Standard for Bedside SleepersCPC
123616 CFR 1236: Safety Standard for Infant Sleep ProductsCPC
Customs entries use all ten digits, so check the exact line. If a certificate applies, the data goes to your broker as seven data elements, or into the Product Registry. Filing ten or more products? Check the bulk CSV first.