5 1/2 month old nap transition

greetings!

wondering if anyone transitioned their 5 1/2 month old from 3 naps to 2 early?

she’s been on 3 naps for over 2 months ,

was sleeping 7:30-6, now waking 5am. She has been refusing her 3rd nap, I’ve tried lengthening her wake windows , which helps but it puts her bedtime after 8pm

wondering if anyone had success with later bedtime? In the past I’ve been successful with earlier bedtime to correct early morning wake up