Darth Sidious- Any Dark Side Knowledge Seekers?

I am just wondering.

Has there been any group of Sith or Sith individuals who sought Palpatine's dark side knowledge?
I mean he is credited as the most knowledgeable Sith Lord and The One Above All.

Or he was pretty much an unknown?

Obviously, I mean post-Palpatine's death.

Knowledge-wise, was he like the ancient Sith Lords?
Did people come to 'learn' from him(or his holocron/s?) ?

Most of his knowledge got blown up with Byss, but the New Republic excavated Mount Tantiss on Wayland, and probably found the small dark side library there. The New Jedi Order also came into the possession of the Telos Holocron, the gatekeeper of which was Palpatine.

And yet they forgot about Korriban. 😂😂😂😂😂