The app reached into your photo library. Photos carry faces, documents, and often GPS coordinates in their metadata.
iOS records every access to this resource in the device's own App Privacy Report — a count of accesses, never the content. The evidence below comes from donated reports: every row was reported by at least 3 separate accepted donations and published under a human verdict (later rows for an approved app inherit its verdict). Access counts reflect the donors' usage; access times are never collected.