RN, and as its forerunner FN, is a populist, far right party. It has never had any particular economic ideology, having wandered around from near-libertarianism to mixed economy as suited it at the time.
Obviously, like most right wing parties, it knows that it's bread is really buttered by capitalists. Currently however, as it's aiming heavily at disaffected lower-income people often in postindustrial areas, it's pumping some flashy worker-friendly stuff. Whether any of that would survive them taking office is another matter, because I think it's far more likely they'd pull a Putin/Orban and just rig the political and media environment instead.