I just corrected the editing of your message because you had performatted your text by mistake visibly (I also added majusculs).

So as to answer you, in the American Gods world the whole idea is that gods are only necessary if you believe them to be. All is about belief.

If you believe a god to be the power that regulates life and death, then it will be the power that regulates life and death - for you.

Actually it is a bit more subtle because as we see the faith or worship of just one person is not enough to create a god (though it is able to sustain or maintain one in a lesser form) - however when it comes to communities or groups now their faith and worship can get big enough.

So technically a god of life or a god of death can disappear and it won't actually affect life or death itself. Because in the American Gods universe, the gods came after the universe - and the gods came after mankind. So technically life and death existed and flew long before gods were invented for them.

That's one of the big ideas of AG - gods are only necessary and needed if you believe them to be.

I understand for the gods of life but the gods of death there are some who are necessary as thanatos the soul-reapers or the gods of death who do not apply death but what happens after I speak of al-gods like hades, osiris yama, Ereshkigal, Izanami, Ah Puch, Arawn, Nergal, Mictlantecuhtli, etc.