X2 so important to have this info when trying to decide whether or not to assist and I usually lean more towards giving it time.I would greatly recommend reading through this article:
https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching
It is great. It needs at least three read throughs to understand all the info. It is worth the time.
I have had two eggs, hatching under broodies, that pipped, and mostly zipped, and then got welded in. Those two needed to be quickly snatched away from the broody and soaked out of their shell.
However, it is rare that they need help, so yes, it is best to wait until tomorrow.