Yeah, Many-Worlds is just a bunch of metaphysics tacked on top of quantum mechanics. It doesn't change any of the mathematics at all, so it predicts all the same things normal quantum mechanics predicts. Yet, for some reason, all the time, you see headlines claiming to find "evidence" for Many Worlds, and you click the article, and you find that all they did was just test a prediction of quantum mechanics is correct... which obviously is consistent with Many Worlds because it makes all the same predictions! There is no experiment that can single out Many Worlds from standard quantum mechanics because they don't make different predictions.