It was never mention in the TNG episode The Last Outpost the Tkon moved stars. It was mention they've moved planets. It is possible they did move stars.Yep ... Mr. Chabon is just confirming with that answer that the
"Ancient, Star Moving People, the Tkon" were mentioned in TNG.
(He typed "Yes the WERE, not ARE)
Somebody needs to re-ask the question so it relates to PICARD specifically.
(and with the proper punctuation. he is a Professional Writer after all)
The question should be: Is the Tkon empire that moved planets, that was mention in the TNG episode the last outpost are the same one that move the stars in Star Trek Picard episode Broken Pieces.