Pampers Newborn Diaper Size 1 (66ct) is currently tracked at KSh 4,160 on Jumia Kenya - working out to about KSh 63 per diaper.
For comparison, Huggies Dry Comfort Size 3 (60 count, a bigger size for an older baby) is KSh 919, or about KSh 15.30 per diaper. Newborn sizes consistently cost more per unit than larger sizes across brands - partly smaller pack sizes, partly the premium newborn-specific materials and fit. Budget for this jump when your baby moves up a size; it typically gets cheaper per diaper, not more expensive.
Newborn phase is short - don't overbuy
Babies move out of newborn-size diapers quickly, often within weeks. At KSh 63 a diaper, overbuying newborn packs "to save a trip" is a more expensive mistake than it would be for a larger size the baby will wear for months.