F-35/5th gen vs Rafale or really any 4.5 jet. F-35 flies to within 100km of the Rafale and decides to signal his wingman to fire a missile. A drone from AIM260 distance away fires on the Rafale and it's all over. Only except to this rule is su-57.
It's also just much much much much much much much much much much worse in larger groups of 5th gen combined with systems.
Rafale has stealth too. But it's subject to what degree of it is introduced over time.
It's possible that by 2030, the F-35 won't have any tactical advantage against the Rafale with stealth alone, whereas the Rafale will detect the F-35 comparatively sooner if it doesn't introduce active cancellation as well.