The app read your Apple Media library — what music and media you own, a durable taste profile.
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.