Correct. Obi Wan is much younger in this series than the events of SW, and takes place only what - 8 years after Mustafar. How old is Lea? 8 of 9? I read a short interview of one of the directors and she made it clear that Vader was “still becoming Vader.” The scene where Obi Wan first SEES Vader as Vader is played perfectly by Ewan McGregor, IMHO. He genuinely looks shocked and scared shitless.
It’s not correct...at all.