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I just found this article. It may have some helpful info.
https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching
There are lots if links at the bottom too.
I'd leave her be for a while but keep an eye on her, you may find once she's rested that she will complete the hatch herself. Often the move a bit then rest for a while then move again then rest again until they eventually kick free.