If you’re asking in the context of individuals who are already a couple trying to pinpoint one another by olfactory memory, it’s technically not impossible, but you’d qualify for hyperosmia if it was, since it’s not exactly like DNA, for a lack of a better way to explain it. You would probably smell things about them, as dogs do, but to the knowledge of current science which in its current olfactory capacity hasn’t found a level where it became apparent, nobody has an “odorprint” in the same way we have fingerprints.
If you’re asking in the context of you looking for who will be your future significant other, this just doesn’t happen. I know there’s a large section of romantic science centered around smells, but this is predominantly in the context of you being able to maintain genetic diversity (flashbacks of the TV show Brink intensify, gawd I miss that show) and completely outside the realm of matchmaking, since it wouldn’t even make sense on a compatibility level.