If she is feeding well and plenty of dirty/ wet nappies, don't wake her,
In many ways it sounds like she isn't a textbook baby in terms of her routine, so you probably need to develop some flexibility to the 'book routines' that are guides rather than must do. One of mine didn't have cluster feeds and just liked to feed constantly in the evening at that age.
In terms of going to sleep.if she's settled and not upset, leave her, but if she needs help... Golden rule 'give it