Less than I thought made from scratch in the USA, rather than simply assembled from bought-in components, then... That does surprise me.
If if the bulk of the structure were to be made in the USA, the builders would still need import the aluminium-alloys which are an aeroplane's primary material, so needing the same relief.
Not long ago I looked up the USA's main metals resources*, and learnt that the country stil has some iron and copper ores, and also some bauxite but that is used for other purposes, no longer refined to extract the aluminium.
I see the wings are made in Italy by Leonardo. That company bought the helicopter manufacturer Westlands, based in South-West England, but still builds the aircraft there.
.....
*Iron, copper and aluminium are the three primary metallic elements for virtually everything, alone or together, directly or indirectly.
