Nap/sleep schedule

What is your little ones nap and sleep schedule like and how old are they?

My 8 month old was doing 3 hour wake windows with 2, 2 hour naps a day and his bedtime was 9pm, he would sleep 9pm - 8:30am. But all of a sudden he’s been struggling going down for his naps and only napping for about 30-40 minutes so I’m thinking he may need to go 4 hours between naps now. But if he does 4 hour wake windows it’s hard to fit in 2 naps a day without the second nap almost running into bedtime or ruining bedtime.

I’m struggling to figure out a new schedule that works for us, is he too young to only be having 1 nap now? I was thinking if he naps from 12:30-2:30 maybe I could just skip the second nap and make his bedtime 7?