It looks like it could be a partial prolapse with either hardened tissue, poop or a combination.
If you have a vet that can see her that would be good.
Otherwise try soaking her in warm epsom salts bath, gently scrub the hardened area to (hopefully) help soften/rid her of it. It may bleed slightly just be gentle - this looks like it will be a process.
After her soaking. Pat dry, then apply some hemorrhoid cream or honey. Keep the tissue (protrusion) moist with the cream or honey. You will need to repeat this process a couple of times a day at least.
Offer her some poultry vitamins, calcium and give wet feed - you can add some hard boiled egg or tuna if you like. Keeping her hydrated is most important.
Keep her in a quiet darkened area as much as you can. This may help stave off laying an egg, but you never know. The prolapse may come out more if she lays an egg, but it's possible it could get stuck too-just so you know. I'm sure every time she poops it will stick, just do the best you can.
Let us know how she is doing.