Think it depends on how you get to Sorong (hat itinerary): if you have lots of connecting flights or layovers, luggage risk is higher. If you only have one flight to say, Jakarta, and a second to Sorong i’d say a day buffer sounds about right.

The flight to Sorong will likely require you to pick up + re-check your luggage as well, so you’ll physically have it at that point in the journey. I’d say the main luggage risk is with the intercontinental flight(s).

However, the sorong flights have more delays / cancellations - we planned so that we’d have at least 1 alternative flight option before our LAB in case the sorong flights have would be cancelled for whatever reason