Seven of Nine Is Starfleet Now

Although Jeri Ryan has been a part of Picard from its first season, she’s been playing a version of Seven of Nine that did not join the Starfleet fold after Voyager returned to the Alpha Quadrant. In fact, we learned that her application to join was rejected, causing her to break ties with her former friends and colleagues and eventually forge her own path as a member of the Fenris Rangers, a band of frontier lawmen that attempted to protect and police the border of the Romulan Neutral Zone.
That’s changed as of season three; having been awarded a field commission in Picard’s season two finale, Seven is now officially a Starfleet officer, with the rank of Commander.