Her poop looks almost ok to me.
When her antibiotic treatment is ended you can start to rebuild a healthy and balanced gut flora feeding her some carrot soup
https://www.ency123.com/2015/09/natural-remedy-for-diarrhea-professor.html
And some natural greek yoghurt will help too.
Did the vet take a sample to determine the kind of bacteria prior to the prescription?
If so, ask for another to see if the infection is gone.
If not, the vet might change/prolong the antibiotics and duration of treatment according to the results.
A good feed will provide ~18% protein and a chicken recovering ng from illness can be given some extras like scrambled egg with rolled fine oats and millet and some poultry vitamins in the water to help regain strength.
I would treat with antibiotics for at least 10 days for oviduct infections.
She might have a hard time passing a new egg after the infection as sometimes scar tissue or adhesions similar can cause obstructions.
What kind of antibiotic did you use and for how many consecutive days?
How much protein does the chicken feed contain?
Do you provide crushed oyster shells...