So, here goes: In Episode 6 of The Book of Boba Fett.
We find out that [character A]:
Is in possession of a lightsaber that formerly belonged to [character B]:
How did he come in to possession of this lightsaber? What is known about how the lightsaber made it from Character A to Character B?
Below is a description of the limit of my knowledge of it:
The last I saw of it, Palpatine used force lightning to blast it out of Yoda’s hands in the big senate room. Yoda then falls to the senate room floor, and escapes in to what seems like ventilation ducts or utility access passageways without being shown to retrieve his saber. I know of no other canon reference to what happened to the lightsaber after that point. Though I know that comics references show that many lightsabers were rounded up and destroyed, I don't know if Yoda's saber, specifically, was included in that. The scene in question would seem to indicate that it escaped that fate, but how or why is beyond my knowledge.