Considering “Shadow of the Sith” is basically just “plug in the plot holes for The Rise of Skywalker” I feel like hardly anyone was excited for it anyway.
An unexplained detail is not a plot hole.
You might as well say the same about “The Clone Wars.” How else would we have known about the ultimate fate of Sifo-Dias, and why the clones did a complete 180 on their loyal Jedi generals so suddenly?