How are your 4 month olds on 3/4 naps?!

I’m always seeing schedules of 4 and 5 month olds taking 4 or even 3 naps daily. Lately my 4.5 MO wakes at 630ish so we’re already on our first nap by 8am. She’s also in her crap nap stage (30 minutes if we’re lucky) so by 330 she’s already taken four naps! I’m having to give her a 15 minute Power Nap at 545 or so in order to make it to a bedtime between 7 and 8.

I feel like I’m stuck in this bad cycle causing earlier and earlier wake ups and I can’t drop the fifth nap. Help? Schedule roughly looks like 1.5/1.5/1.75/1.75/1.75/2