Dark Empire never said “Sith” besides the scene where Palpatine visits Korriban, and it’s made clear in that scene that Palpatine isn’t one of them.
In Rise of Skywalker, Palpatine being a “Sith” and his desire for “the Sith” to be “reborn” is frequently mentioned.
Obviously not everything is exactly like in the Comic but it often is far to similar to be a coincidence. I now looked up the comic again and to me it looks like they even nearly copypasted some shots from the comic.
The entrance to Exegol for example looks extremely similar to Palpatines arrival on Korriban. (the big Sith statues to the side, the ship in the background even the camera angle)
Another example is how Palpatine is consumed by his own Force power. Look at the scene that happens on the Eclipse in the comic and compare it to the movie. (camera angle, Palpatines pose, the look of his face)