My girl has always been on the low end of night and nap sleep. She had been solidly taking 2 hr naps since around 15 months when she dropped to one nap. At daycare she takes slightly longer naps bc she's more tired I guess. These days at home we are lucky to get over an hour. She isn't sleeping more at night it just seems she is needing a bit less overall sleep.
Not sure if this is an age thing, molars (her 2nd are coming but those haven't usually been issue) or what?