Nezuko Kamado, a character from the anime and manga series Demon Slayer: Kimetsu no Yaiba, has the ability to heal others. Nezuko has demonstrated an incredible healing ability, capable of restoring lost limbs and even healing illnesses and poisonous impact.
Nezuko’s immense healing powers have the potential to heal any injury, including the injuries of the Sound Hashira. Her abilities are far more powerful than most people realize, and so It is certainly possible that Nezuko could heal the sound Hashira, but it is uncertain if she could heal the Oyakata.
However, the Oyakata is a powerful figure in the Demon Slayer Corps and it is unknown if Nezuko’s healing powers are sufficient to heal them but this is never attempted as the Oyakata’s injuries are far too severe, and any attempt to heal them would likely be in vain.
Furthermore, the Oyakata may be beyond ordinary healing abilities. There are many powerful artifacts and techniques in the Demon Slayer Corps, and it may be necessary to use one of these to heal the Oyakata. In any case, Nezuko’s healing powers are certainly worth exploring in this situation.
However, it is not specified in the series if her healing ability can be used on the Sound Hashira or the Oyakata. Additionally, It is also not mentioned if Nezuko has the ability to heal the Oyakata, as it’s more of a speculative statement and not something that is confirmed in the series.
Nezuko could try to heal the Oyakata, but it is impossible to predict whether or not it would work. If it did work, it would be nothing short of a miracle.