Good that she's eating and drinking......pooping well too?She seems to be eating and drinking so that’s good, I was going to put her out today but I don’t want to do it until she is back to herself since my other hen is keen to prove she is the alpha hen.
You only have the two birds?
Best if you can keep an isolated bird where the flock can see them,
can make reintegration much easier.
Might even let her out an hour before roost time to stretch her legs,
then crate her back up off the roost after dark if you feel it's necessary.