Seriously, the Mahoraga wank is something else considering it's regeneration only ever happens if you constantly spam it with something it can adapt to.
They act like it's the corner stone of why Mahoraga is unstoppable when he explicitly isn't
There's a reason why Sukuna started bringing in Mahoraga's wheel first and foremost before he brought in Mahoraga itself because you can clearly kill it before it starts adapting/regenerating from your attacks and you can blindside it with a different attack entirely before it can fully adapt to your first.
EDIT: Though unless I'm missing something, The Immortal doesn't have a way to kill Mahoraga though... but it could if we give the damage that Nolan taken from him and the Wonder Woman-expy to be what knocked him unconscious at the end to be most of his so...