It’s easier to transplant the heart and lungs in one go than to transplant just the lungs and leave the heart behind. Fewer blood vessels to cut and reconnect. Survival rates are actually higher for the combined transplant.
Just looked up the figures - five years after a transplant, the survival rate for lung transplant patients is 45% and for heart/lung transplant patients it’s 49%.
I don’t know if they’ll do it in this particular case, but they usually then try to implant the heart removed from the heart-lung recipeint into a patient needing a heart transplant.