I don't know how old your daughter is Children aged 4-5 are in the stage of interest cultivation, so we should praise her graceful movements when dancing, which is the best encouragement. Children with interest in learning will naturally dance better.

I don't think this mother should worry too much if she just performs on stage, because it is a process of experience. It is normal for your daughter, even a professional dancer, to be at a loss for the first time, but it is necessary, because it is this loss that will make her generous and successful for the second time in the future. At this time, first of all, don't worry too much and don't expect too much. Besides encouraging her, you should give her ways. The lights on the stage are so strong that the actors can hardly see the people under the stage. You can tell her to choose a front light (face light) as a mother after going on stage, so that the child will naturally relax on stage.