11.5 month old only sleeps 9-10.5 hours at night

Since 7-8months she’s done this but she slept like 3.5hrs worth of nap during the day. Now, I’m only getting 2 naps 30-40min long . I’ve tried adding a 3rd one no go . Tried to extend / shorten wake times no change same results. We aren’t too cranky till it’s close to nap and close to bed time we get very cranky around that time though (that’s normal I presume) we also have hit our walking mile stone at 10months and I know regression can happen around big mile stones . My big issues is I’m scared that this isn’t “normal” or enough sleep for her if it is then I don’t care lol anyone else have this experience?