I’d personally wait to take it and put the chick in a brooder. Keep in mind that it will be very lonely and need a buddy, also If you take it from her now they likely won’t have a bond when they’re able to be reintroduced once the other eggs hatch. I’d be pretty surprised though if you don’t have another chick pip in the night or early tomorrow so waiting is probably your best rout for now unless she’s showing obvious signs of wanting to leave the nest. I’ve had hens that have hatched out chicks for an entire week only hatching one sometimes two every 24 hours. for now I’d just make sure food and a water dish the chicks can’t drown in nor will get spilled into the nest are within reaching distance or a short walk from the hen where she can easily feed the hat hatched chick while still keeping on the nest. I’d also say it’d be best (if you’ve got an incubator) to go ahead and heat it up and get lockdown humidity levels so that if she gets up you can pop and Unhatched or pipped eggs in and hatch them yourself and then pop the chicks as they hatch sneakily under her at night so she’s still mothering them all. Hope this is helpful!!