WildHens
Chirping
I would float test to be sure but it sounds like her eggs quit at some point. 26 days is just too long in my experience.
If you can find a source for day old chicks I would graft 3 of them to her and let her get up and raise them.
X2.. I get super nervous when I have a girl sitting 22 days.. my broodies are all tiny bantam breeds tho too, so probably lose weight faster than an Orp, but I'd still want her off the nest asap. . Check your feed stores if you can't find anyone else with chicks. .wish we were close, I'd send u plenty.