Namikaze Minato's arm didn't recover.

Seeking jade contains enormous energy, which can even exert its power beyond blood and dust, and can destroy a forest in an instant. At the same time, because it contains the power of "Yin and Yang Escape", the filth can't be recovered (if the power of seeking Tao Yu is not completely controlled, the filth can be recovered after being destroyed, such as Senju Tobirama and Sarutobi Hiruzen), and the soul will be damaged (Ootutuki Hagoromo didn't take out Namikaze Minato's broken arm), and even he can't be reincarnated and die. (Senju Tobirama talks about the situation in Namikaze Minato)