Two years it not that old, and the topic is obscure enough that it could plausibly have gone unnoticed. Bell's inequality went virtually unnoticed when it was first published.
My money is definitely on parlor trick, but I would still like to understand why.
The paper is from May 2022. Don't you have the answer to whether it's big news? Whether the news is big is (usually) apparent/assessed when it is new.