That looks very serious. I’m amazed that the cat is not infected. The mucous membrane looks inflamed, it’s normally the same color as the inside of your mouth. Try to find someone who has experience with animals. If there is no vet nearby, someone else.
If you cannot help her, I agree with N nansiludie , that you should have the cat put to sleep so she doesn’t die in pain. It may be the kindest thing you can do for her.
If you cannot help her, I agree with N nansiludie , that you should have the cat put to sleep so she doesn’t die in pain. It may be the kindest thing you can do for her.