The story is a bit silly, but it has a strangely similar setup given the severed hand in a jar found in the Darth Vader comic.
Like, imagine that it was an evil clone Luke that picked up Grogu in The Mandalorian, and not the real one?
A potential Luke Skywalker clone running around would be a pretty huge deal, especially if his existence was unknown to this point.
That seems unlikely given the Luke that arrived had an X-Wing and R2-D2, but I’d almost imagine finding a replica astromech and X-Wing would be the easy part of that process.