Baby’s sleeping schedule makes no sense...

When my child (9mo) doesn’t get 2 good naps during the day she doesn’t sleep well at night. I’ve noticed on days when she only gets one nap or takes two naps but only for an hour she only sleeps 4-5 hrs at night before she’s awake. But when she takes her usual 2 naps that are 2-2 1/2 hrs she will sleep 8-12 hrs at night. I’ve asked people I know about this, and they tell me it makes no sense, or it’s just a coincidence. My favorite is “she’s telling you she doesn’t need a nap” My response to the last one is really? Are you dealing with her grumpy butt because she needs one but just won’t no matter what I do and are you up with her til 11pm or later because she’s so tired and just crying, then are you up with her at 3 am til whenever she decides to crash? No? So don’t tell me she doesn’t need a nap. 😑 otherwise feel free to come over and let me sleep and you stay up with her. But you know they’ll never do that, but they’ll give all the opinions on what to try and what I’m doing wrong...