Does anyone have any tips/tricks for getting a 6 month old to sleep past 5am?

LO sleeps from 6:30 or 7 till anywhere between 4:30 and 6:30 with 1-2 feedings. Getting to 6:30 has been unheard of lately.

I've tried feeding her and putting her back down, rocking her, soother, letting her cry and combinations of those. She either laughs and kicks her feet for a while then cries or just cries.

She's tired less than 2 hours later. If I put her to bed later, she'll sleep longer, but it's usually the same number of hours. Also her last nap ends 4 or 4:30, and she's tired and cranky by bedtime, so pushing it back is hard.