J.J. AbramsStar Wars: The Rise of Skywalkeris very much a sequel to AbramsThe Force Awakens.
Its also a sequel to Rian JohnsonsThe Last Jedi, but itsmostlya sequel toThe Force Awakens.
Here is a list of some of the biggest changes.

Lucasfilm (2)
Early inTLJ, Supreme Leader Snoke (Andy Serkis) derided Kylo as a child in a mask.
Kylo smashed the helmet, ditching it for the rest of the movie.
The film set Rose up as a Resistance player and potential romantic interest for Finn.

Lucasfilm (2)
The moment was a stunning soundless visual in the film that many viewers loved.
You wouldnt even need a manned ship, just a hyperdrive engine and a bunch of surrounding metal.
So when things get dire inTROS, the idea is floated to try the Holdo Maneuver.

Lucasfilm; Jonathan Olley/Lucasfilm
Poe (Oscar Isaac) quickly dismisses theTLJevent as a one-in-a-million shot.
(Not to mention, turning the Resistance into suicide bombers perhaps isnt the best idea.)
Luke appears on Ahch-To when Rey (Daisy Ridley) tries to throw her lightsaber into a fire.

Lucasfilm (2)
Force Skype usage:This looks like it’s a revision, but isnt really.
Reys parentage:The big one.TFAintroduced the mystery of Reys parentage.
The call for help:This is another one thats debatable whether its a do-over or an evolution.

Lucasfilm
InTLJ, the Resistance puts out a desperate call for help while on Crait, and nobody shows up.
Its not clear why does the galaxy simply not care?
Was it too short notice?

Lucasfilm (2)
Because at least a year passes beforeTROSopens.
The Resistance is still struggling.
The idea is the Force is awakening in others.

Lucasfilm
This also doubles down on the idea behind Reys parentage: that nobodies can be gifted too.
But as for Broom Boy … guess the kid went back to sweeping!

Lucasfilm (2)

Lucasfilm