I’m sorry that she is still lame. I am not sure that she will improve since she has no diagnosis. You might want to chicken sling chairs to see if one of those might help her be able to be more upright and easier to eat and drink with bowls close to the sling. Or she might feel comfortable in a wire dog crate around the other chickens outside where they like to hang out. Here is a link for chicken slings, and look at posts 5, 11-14 especially: