(Usually) modern western atheists/materialists: one life - this one, and it's finite in time.
Believers in quantum immortality: one life - this one, and it's infinite in time. We see other people die, and other people see us die, but from our point of view, we are immortal.
Mainstream Christians/Muslims: two lives - this one is the first, it's finite in time, and the next one is the second and last life, and it's infinite in time.
? : two lives - an infinite life before this one that extends infinitely in the past, then we are reborn into a mortal being, this Earthly life is the second and last life, then there is true death.
? : two lives - a finite life before this one - and this life is the second and last life, it's finite, then there is true death.
? : two lives - this one is the first, it's finite, and the second life is the afterlife, but it's finite in time as well.
? : two lives - a finite life before this one - and this life is infinite, from our point of view we are immortal, just like quantum immortality
? : two lives - an infinite life before this one that extends infinitely in the past - and this Earthly life is the second one, which is also infinite, like quantum immortality.
? : infinite lives - infinite reincarnation, forever
? : finite lives - several reincarnations, but one day it will end and there will be true death, or an infinite state of apathy