X224 hours pipped before zip is not uncommon, and if she did miss the air cell, then it could be an additional 24 hours (they normally breathe the air-cell air for around 24 hours before pipping the shell).
But here's a guide for you, in case you need to assist. Just don't rush it.
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/
You have the best help in WV and Pyxis.
The important thing is not to panic and jump too soon. Keep updating as often as you can with any changes you see.

