It's been who knows how long since the alliance took over the wall, if the scions, or Lyse specifically, believed Tupsimati was still out there she would have gone to retrieve it as a memento, the fact that there's zero mention and that the staff was already not enough to power the binding spell a second time makes me believe it was destroyed.

Another thing to remember is that between Moenbryda's aether siphon thing and tupsimati you still didn't have enough aether to summon the blade of light without the blessing of light, so to me it implies that the staff wasn't at its full power, which is why Papalymo had to use himself as a battery the same way Moenbryda did before.

Now whether there are other sources of concentrated aether is hard to know, if there is another device it's probably in Sharlayan, there might also be other creatures out there with a similar condition as dragons eyes being full of concentrated aether.