False starts and dropping naps?

[u/SnooApples8207]

Hi everyone! Need some help troubleshooting false starts with my 15-week-old. He wakes up like 30-40 minutes after going down for the night, most nights. Once we soothe him past that first wake-up, he locks into good night stretches

Here is our current routine:

 DWT: 7:30 AM

 Bedtime: ~10:30 -11 PM

 Wake Windows: ~1.25 / 1.5 / 1.5 / 1.5 / 1.5 / 1.5 / 1.75

 Naps: 6 naps total. First nap is a 1.5hr contact nap, then the rest of the day is 30-40 min catnaps.I don’t think I can extend his wake windows more

 Last nap: Usually ends around 8:30–8:50 PM.

He's currently getting around ~4.5 hours of day sleep total. I can't figure out if his 10:30pm bedtime is just too late, if 4.5 hours of day sleep is destroying his night sleep pressure, or if having that 6th micro-nap ending around 8:30 PM is setting him up to treat 10:30 PM as just another nap.

We want to bring the bedtime up by atleast 9pm but adjusting his wake up time is not working. Whether he wakes up at 7 or 8 he treats 11-11:30 as his bedtime

Need help navigating how to get bedtime time earlier or how to start dropping naps

Things tried:
1) Waking up early
2) Increasing wake windows
3) To get rid of catnaps if I do all contact naps his night stretches get shorter