Hmm, I don’t know about that. Makes it sound like he’s saying when a Jedi dies they can essentially perform an intel raid and report back.
When I first saw TROS, when Rey said she destroyed Ren’s ship and didn’t have the Wayfinder so she cannot get to Exegol, I anticipated Luke responding with, “Well, you see, when I died and became a ghost I gained omniscience so I can simply tell you how to get there.”
I know Ben Kenobi imparted new, plot-related information to Luke in ROTJ (or just narrowly avoided it, since technically Luke produced the key bit), but I don’t think this is proper for a spirit like this in a story like this.