I have chicken broth... But it might have onion in it...
You probably know onions are poisonous to cats, as is garlic. She’s probably drooling because she still nauseous. Hopefully her stomach will settle in a day or two. But I would say keep doing what you’re doing, because she needs to stay hydrated. For my babies with kidney problems I bought fountains. Little tabletop fountains. They were attracted to the running water and presumably would drink out of it. I noticed that two did, always hanging around the fountain.