I'd say it should be absorbed by day 23, but that's not always how things are. I've assisted many chicks and have never lost one from intervening yet, but it's always a gamble, and there are other chicks that I chose not to assist (mostly in situations where they hadn't zipped much, if at all) that didn't make it out who may have benefited from my help but may have not. I will never know. Ultimately, just do everything so, so slowly. If you see any bleeding while assisting, stop immediately. If you get to a certain point and you see the yolk isn't absorbed, stop.
You could also just wait it out. I typically help chicks out when I can see large portions of them, not just if a beak is poking through. However, I've had two instances where they pip and are chirping with their beaks stuck through and they just die like that, too. Ultimately, the call is yours. Sometimes helping is needed, and sometime's it's not. It really is a gamble.
Good luck to you and your chick!