The final season of Star Trek: Picard was a great-big The Next Generation reunion, effectively a movie trilogy's worth of story. Still, limitations on budget and time meant not every character producers wanted could be included. For example, Kathryn Janeway could've been present for Seven of Nine's promotion. However, the return of Michelle Forbes as Ro Laren was the most surprising, and the character's death was the show's most tragic. Though, like Admiral Shelby, who took two phaser bolts to the chest, she might actually be okay.
Source：https://www.cbr.com/ro-laren-star-trek-picard-death-most-tragic/
