Wow. Just finished this game today. It was my Christmas gift from my family, since Dec 25 to today I could not stop playing it.
It continues where the last one ended. Just few years later. If you played the fallen order, I should not need to let you know what the adventure it is all about.
Just that this one is far better than the previous one. The Story is deeper that the previous one, en planets are wider to explore, in overall all is better.
There are 6 chapters, where the story gets its twists that you never would think about happening. It really is a great game.
It took me 59 hours to get the platinum trophy, however, the story would be like 20 hours. There are 2 trophies that are really long to get.
Spoiler: I would recommend advance in the story before getting the extra things, eventually you will get every location of items in your maps and all the skills to go through all the areas. So, instead of going back and forth to places to get there fewer times.
The game is one of the best I have played. I do recommended it.