Just like what Pixar did to Cars 2 with Cars 3, as said in https://www.polygon.com/2017/6/16/15821010/cars-2-pixar-cars-3 (I don’t like that Pixar did that, and I think Cars 2 was great), the Star Wars sequel trilogy pretends that the prequel trilogy never happened.
Cars 3 is to Cars 2 and Star Wars Episodes VII-IX are to I, II, and III.
No mention of Count Dooku, Gungans, midichlorians, or things like those in the Star Wars sequels. None of the planets that appear in the prequels but not the originals appear in any of the sequels.
George Lucas wouldn’t have done that.
The only words I notice that were said in the prequels and sequels but not the originals are “Sith” and “Darth Sidious,” the latter said in Episode VIII: The Last Jedi but not in Episode VII: The Force Awakens.
In some ways but not all ways, this “pretending the prequels don’t exist” good. I don’t like the concept of midichlorians. And I don’t like the gungans like Jar-Jar Binks and other cheesy unpalatable elements of the prequels.