The Triumph of Skywalker
The Original Trilogy follows much of the classic outline of the Heroes Journey with Luke, With another classic of good vs evil, the light vs dark. Ep.4 (Separation) The Ordinary Luke called to adventure. Meets his mentor Obi-Wan. Trials Face the death of his family and his mentor. Use the Force to blow up the Death Star. Ep.5 (Supreme Ordeal) Meeting of the shadow self in Dagobah. The Ordeal, Vader his biggest enemy the killer of his mentor is his father! Ep 6. (Unification) Sacrifice, Luke turned him self in (I'm endangering the mission) so that the Endor mission will be successful. Showdown, it was really a show down between Luke and Palpatine for his fate or his fathers. In the end it was his pleas that turned Anakin from the Dark Side. Resurrection, The Return of the Jedi! Incorporation when in the end he rejoins with Luke and Leia he is now the master of two worlds. Each of the episodes is part of the whole that tells a complete story that cover the Heroes Journey theme. Most see it now as about redemption of Anakin but when it first came out it was more Luke's win over the dark side, over evil. Not only did he beat it he pulled his father back for it too in the Triumph of Skywalker.
The Fall of Skywalker
The Prequel Trilogy is a tragedy that follows Anakin's path to the Dark Side. Fear leads to anger, anger leads to hate, and hate leads to suffering. Young Anakin is full of Fear, Yoda says as much in Ep. 1. In Ep. 2. Anakin's fear has lead to anger his mother died and the hands of the sand people and he killed them all in anger... the Women and Children too. In Ep.3 that anger has turned in to hate which destroyed all he cared for has his contempt for the Jedi was fed by Palpatine. Anakin literally said "I hate them" in the movie. Thus with the big NOOOOOOO! in the end is Anakin's suffering. Again each episode telling a complete story as a whole of the tragic Fall of Anakin Skywalker
The Legacy of Skywalker (if anything)
The Sequel Trilogy is a hot mess. Unlike the first two trilogies there really isn't a flow connecting the story. Ep.7 is everything that that was old is new again embrace the past while moving to the future with side running similarities to Ep.4. Ep.8 is the only way to move to the future is to kill the past, failure, and what you care about really doesn't matter and lots of shades of grey. Ep.9 Good vs Evil but more of an inner battle than physical, Rey has to deal with her lineage Ben has to deal with the deeds he has committed in the past. Each episode really is not part of a whole and oddly enough you can watch t 7 and 9 and kind of get the just of the whole thing with out even watching 8. But in the end it is Rey that takes the name to honor the Legacy of Skywalker.