This internal archive contains the data files associated with the review manuscript: "Laser Shock Peening in Hydrogen Environments: Coupled Stress–Transport–Trapping Mechanisms and Application Gaps," Materials & Design, 2026. The article is a critical review and does not report a newly generated experimental raw-data dataset. Quantitative values compiled in the manuscript, including those summarized in Table 1, were extracted from and critically interpreted against the cited literature.The archive is intended to preserve the main source and supporting publication files used during manuscript preparation, revision, acceptance, and production. Depending on the archived version, it may include:- graphical abstract,- Highlights,- Figures 1 and 2.