I think I might of figured it out

My little july baby is still not sleeping through the night and is getting roughly 8 hours of night time sleep. So figure no naps after 5pm it’ll just be bed time. Normally baby is up at 7ish nap at 9ish nap again around 12ish nap again around 2/3 these are round about times but all week baby hasn’t been going to bed till around 8:30/9 I want to change that to 6:30/nI’m worried about lack of night sleep effecting baby although doctor said baby is doing good and Is hit all milestones and is ahead and eventually will sleep at night should of asked about bed times 🤦🏽‍♀️ and night time sleep hours. ANY ADVICE LADIES 😊