Warning: SPOILERS for Star Trek: Picard Season 3's First 3 EpisodesCaptain Vadic (Amanda Plummer) knows that Admiral Jean-Luc Picard (Patrick Stewart) has an android body in Star Trek: Picard season 3, which begs the question of how this information is so widespread and who else knows Picard is synthetic. In Picard season 3, episode 3, "Seventeen Seconds," Jean-Luc is reeling from the emotional gut punches of learning he has an adult son, Jack Crusher (Ed Speleers), and his first heart-to-heart with Dr. Beverly Crusher (Gates McFadden) in over 20 years. Meanwhile, Vadic has already taunted Picard about his synthetic body.
Jean-Luc Picard died and was resurrected in a synthetic form called the Golem at the end of Star Trek; Picard season 1. The elderly retired Starfleet Admiral was dying of a rare brain disorder, Irumodic Syndrome, when Picard season 1 began. Aware that he was on borrowed time, Jean-Luc set off on an intergalactic quest to save Soji (Isa Briones), the synthetic daughter of the late Commander Data (Brent Spiner). This ultimately led to Coppelius, Soji's homeworld, where Dr. Bruce Maddox (John Ales) and Dr. Altan Inigo Soong (Brent Spiner) built a new synthetic race. When Picard succumbed to his brain disease, Soong, Dr. Agnes Jurati (Allison Pill), and Soji transferred Jean-Luc's consciousness into the Golem. The resurrected Picard was good as new, free of Irumodic Syndrome.