Yeah, it sounds like she needs more of a wind down - the trick is figuring out what will help her to do that.
I remember when a breastfeed was all DS needed.... oh, those were the days! We're still struggling with this too, so interested in any other ideas you get. I'll have to try music I think.

I take him for a walk when he's tired and he's out like a light within 5 minutes (sometimes it's 1). But if we try to put him down for a sleep... IF it works it takes 20 minutes minimum...

At bed time we have a bath, walk, books, lights out then.... 1.5 hours of stories, singing, cuddling, crying, exasperation until finally he conks out.