is it possible to make their schedules over lap at all?

okay soo I have used this sub for help with my second baby and it has definitely helped us a lot. my second is 5 months old, her daily wake time is 7 am, nap around 9 am second nap around 12-12:30 depending on the first nap, then third nap is around 4:30-5 depending on second nap and then bedtime is around 7:45-8 pm. my two year old is like 7:30ish am then nap around 1ish and bed around 8:30 pm.

once we fully sleep train our youngest , I have been into the idea of a set schedule. i plan to sleep train her around 6 months like we did with our first. but is it possible to have one where their nap will over lap at least for a little? I would love a small reset time alone. idk if it’s possible or if i’m asking for a unicorn schedule lol. thank you for your help and advice.