Season 19 of Grey's Anatomy ended with a shocking turn of events sure to have viewers tuning into the seminal 20th season. The two-hour finale brought an end to what was a turning-point season for the show, with the exit of Meredith Grey and the surprise end for her sister Maggie Pierce. The two-part finale split the storylines into an episode focused primarily on the interns, and one focusing on the attendings at the Catherine Fox Awards.
Source:https://www.cbr.com/greys-anatomy-season19-finale-explained/