Mine doesn't practice at home that much. She does occasionally, on her own terms, but I never make her, and that is how I want it. For her, being on gym team has sooo many more benefits than just being an awesome gymnast and making high scores. She probably won't ever be any kind of super star, and I am okay with that. Though it is nice to see them do impressive tricks and get strong, for us, this is only part of the picture. My daughter has Aspergers and ADHD, and gymnastics has helped her become more social and develop body awareness and coordination. It has also helped her self-esteem. She loves to impress kids at the playground with her strength and skills, but only does things on her own if they are really fun to her, like new skills.
I wouldn't worry about your daughter not practicing at home, and certainly wouldn't force it. Be patient, wait a year, then you will know better if she likes it enough and is benefitting enough in other ways for her to continue with it.