Lead Poisoning Prevention Act of 2021 This bill reauthorizes through FY2026 grants and programs carried out by the Centers for Disease Control and Prevention for screening and other public health activities to prevent childhood lead poisoning. Additionally, the bill changes the name of an advisory body that coordinates federal lead poisoning prevention efforts from the Interagency Task Force on the Prevention of Lead Poisoning to the Advisory Committee on Childhood Lead Poisoning Prevention. It also modifies the committee's membership, reporting requirements, and other duties.