Yeah, the funny thing is, I'm not a TROS hater at all, I quite like the film, and in general, I can "check my brain at the door" where escapist cinema is concerned, particular sci fi/fantasy- its not real, just go with the fiction and whatnot.
But that dagger does make me a little nutty to think about.. so this stupid sith dagger was made for the purpose of standing at some specific spot in front of the death star wreckage, where it will line up with the death star wreckage (IF you stand at the right spot/perspective, which the heroes manage to literally do first try- they very well could have stood at some spot with respect to the wreck where NONE of that shit would have lined up) and some point on the hilt or whatever points to where in that wreckage the stupid sith wayfinder can be found -which then gives whoever finds it directions to the secret sith world. And this wayfinder was kept in the death star, presumably in the OT times before it was blown up, for someone to find? I guess.
Who is to say the stupid thing would still be intact, let alone still in that spot after the death star blows up and crashes onto the nearby planet/moon. And again, someone THEN made a Sith dagger for the purpose of leading someone to this wayfinder, located in the wreck which would lead them to the secret sith world. Why would there even need to be a secret sith world in the times of the OT, or a wayfinder to lead someone there?
So, it does kind of beg the question- why even bother? With all of it.. (other than making for a convoluted series of quests for some "heroes' to pursue throughout a movie).
Like I said, check your brain at the door and you will be fine.....
My thought is that Palpatine was bringing the Wayfinder around with him, as an artifact too precious to ever leave his side. When the Death Star fell and he managed to raise his consciousness back on Exogol he then instructed one of the acolytes in the making of the dagger, which he gave to Ochee, presumably should Ochee ever need to go see him in person on Exogol (probably after retrieving Rey or some other target?)