I thought the sounds she makes were just her trying to settle
Well they kind of are. Given they are going on for an hour or so though, they are more accurately sounds of her trying and failing to settle. Its very personal and everyone is different, but I'd give baby help to sleep. I found that longer term healthy (independent) sleeping came from making the process of getting to sleep as easy as possible for baby.
Therefore the idea of leaving baby to it, when it's difficult for her to get to sleep, feels quite alien to me. So maybe I'm not the best person to advise you.
I know some people do leave their baby to grumble and cry to go to sleep themselves, but my understanding was that this was a few minutes, a long time (unless doing the controlled crying).
I also know - from experience - that there will be odd days here and there when baby cries to sleep and for whatever reason that's just the way it is. That's just part of parenting. But its a different thing to it being an every night thing.
OP - Hopefully if you're able to sort out daytime sleep then she'll find it easier to get to sleep. Its often the case that good sleep = better sleep and unfortunately poor sleep = worse sleep. Breaking the cycle of over tiredness will help.
Do other people's babies make noise whilst settling?
Mine didn't because they all had a dummy for independent settling. Therefore there really was no noise aside from sucking noises when they went to sleep. As mentioned, I think its not unusual for babies without dummies to make noises as they settle. Not sure how long for though?
Given I have several children (4) and always stay with the baby until asleep for the first 12 months, I just wouldn't give over an hour or so of my time to getting baby to sleep. I've got other children who need me and am too busy to waste time like that. I would expect baby to go from awake to asleep in 5-10 minutes usually, sometimes 15 minutes. An hour sounds like a very long time to drop off to sleep. Its why I mentioned that maybe she needs more help than she's getting?