Could you rent a storage box / post box where you move to and sent them there before you leave? I never used such a service though.

You could also check how the new country handles parcels. In mine they don’t sent them to your home and all parcels are always in a post-office / supermarket who handles the parcels. Allowing you to have them sent there and they hang on to the parcels for up to two weeks.

Could you also not pack them with the rest of your items, or is everything in suitcases on the plane? Like do you plan on buying all furniture or kitchen stuff there?