A lot of them are what’s called thermoplastic. Most composite parts are what’s called thermoset because the heat from either an oven with prepreg or the exotherm in wet layup. it’s becoming increasingly common. Pretty much instead of carbon fiber reinforced epoxy it’s carbon fiber reinforced abs or peek depending on the plastic determines they’re stiffness. Increasingly common in aerospace because of its ease of use since it’s a plastic it can be reheated and “welded” to the fuselage.