Hen being picked on and wounded.

[CB_ChickenGal]

Earlobe looks ripped. Maybe she caught it on a staple or fencing.

Blood and scabs are an attractant for sure. Being separated for days, she's likely lost some or most of her standing within the flock. This is one reason why I do everything I can not to separate out a bird that is injured or sick. If I do separate, I make sure they are seen daily or even put them in a kennel within the run or coop so they are "not forgotten".

You may have to just stand by and let them work it out. See how it goes.

Ime, a rooster in not in the pecking order of hens. He revolves around the order. He may intervene after a period of time when hens are squabbling, but mine stand and observe for a bit before saying

It’s possible she injured herself. If anything is sticking out anywhere those little fools will always find it, lol!
I should have mentioned I did let her out a few times a day to free range around the run while the rest of the flock stayed inside, so they did have a little bit of interaction through the cage.
I’m gonna keep her separated until she doesn’t have any scabbing left and try again.
Thank you!