Rey is the avatar, for all of the Jedi. Rey is also a grandchild of not a Skywalker, but Senator Palpatine/Darth Sidious. She could have become a Sith Empress. She is a Jedi, but she can also shoot Force Lightning. Nothing is ever in black and white.
Rey didn’t end up with Finn or Kylo/Ben Solo. She could have been bi. Rey is still single, by the end of the trilogy. She kissed Kylo/Ben, when he died, but she didn’t get paired off with anyone. Or get killed off.
Rey was trained by Master Leia, which is really cool. Luke Skywalker comes back and helps Rey too. Kylo/Ben and Han Solo also have a good moment.
Rankings: Force Awakens > Rise of Skywalker > The Last Jedi. Original trilogy > 2000s prequels > new reboot 2010s trilogy. At least, Rise of Skywalker was better than Rogue One.
It is good that the Star Wars franchise finally had a female Jedi protagonist, in Rey. In the next Star Wars trilogy, the writers should be able to have a female Jedi protagonist AND the execution of a good plot. Via adoption, Rey did become a Skywalker. My hunch was right, back in December 2015.
The Force Awakens was good. The Rise of Skywalker was OK. The overall reboot trilogy was so-so. It’s canon. Someday, Lucasfilm should bring Rey back, in a way that is better, than this trilogy. It could be said that I have A New Hope.