Should Adam’s and Eve’s death(loss of immortality) be regarded as a sacrifice? In a similar way to Christ dying on the cross for our sins, I would assume Adam’s and Eve’s death contributes to their eternal after life.
And the Lord God commanded the man, saying, Of every tree of the garden thou mayest freely eat: But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.
and Genisis 22 proves sacrifices among humans were something God ordered.
Some time later God tested Abraham. He said to him, “Abraham!” “Here I am,” he replied. Then God said, “Take your son, your only son, whom you love—Isaac—and go to the region of Moriah. Sacrifice him there as a burnt offering on a mountain I will show you.”