Not pooping is what makes egg binding deadly within *about* 48 hours.
Crop looks full.. so that will be a condition to monitor and see if it goes down over night before she accesses food/water the next day.
She might be full or the crop may be blocked, sour, impacted, etc.. check out this...
They *usually* stay in the nest trying to lay the egg.. in MY experience.
Is she pooping? If so then not *likely* egg bound.
How does her crop feel? Empty, hard, or squishy? Is she eating or drinking, responding to treats?
What is her age? Seeing she a sex link.. other reproductive conditions...