Each product's delegated act will specify separately, generally including: product identification, material composition, substances of concern, carbon footprint and environmental footprint, durability and repairability, recycled content, end-of-life treatment methods. The data must be accessible through a data carrier on the product (such as a QR code).
Full explanation and HS code list: https://patisco.com/zh/eu-check/digital-product-passport Check which EU regulations apply to your products using HS codes: https://patisco.com/zh/eu-check