Weird noise or normal noise? (‘24 BB manual)

At cold start, something in or south of the engine compartment makes a not-worrisome kind of minor rattle that seems to go away after a short amount of time. I’m not technical at all, but I think it’s usually the kind of thing associated with the timing of catalytic converter warm-up something? Anybody have any clue what I’m referring to?

For clarity, I bought this ‘24 from a dealer last September (‘25) “used” with 850mi on it and a verifiable 1 owner. No recorded maintenance problems. Otherwise presents as new vehicle with new car smell still.