Yes. Various types of treatment are available for children and adolescents with social anxiety disorder. Some commonly used psychological treatments are cognitive and behavior therapies which focus on teaching children how to gradually confront feared social situations, challenge unhelpful anxious thoughts, improve social skills (e.g. how to start a conversation, introducing themselves, eye contact, etc), and use relaxation techniques (e.g., breathing exercises).
Certain medications are also used to reduce anxiety in social situations. The goal of medication treatment is to enable the child to be in a social situation without being overwhelmed by anxiety. Your primary care provider or a psychiatrist can discuss medication options with you in more detail.