There are several ways to encourage your daughter to be less messy. One approach is to establish clear rules and consequences for not keeping her space tidy. For example, you could set a specific time each day when her room must be clean, and if it is not, there could be a consequence such as not being able to participate in a desired activity.
Another approach is to teach her organizational skills and give her tools to help her keep her space tidy. This could include things like storage containers, labels, and a designated place for everything.
Additionally, you could try to model good organizational behavior yourself and praise her when she does keep her space clean.
It’s also important to consider the age and development of your daughter, and to have open and effective communication with her to understand the reasons behind her behavior, and to find solutions that work for both of you.