What makes you think Adam and Eve repented of their sin of bringing evil into the world?
They did not die at the moment of sin.
They were ashamed hidden from God,trying to hide their knowledge with fig leaves.
This shows a act of repentance.
God covered their sins with the skin of animals,the animals were killed and blood was shed for their atonement.
The animals paid the price and covered their sin,Christ paid the price for all mankind once and for all.
Romans: 5. 12. Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned: 13. (For until the law sin was in the world: but sin is not imputed when there is no law. 14. Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come. 15. But not as the offence, so also is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, which is by one man, Jesus Christ, hath abounded unto many.
Notice vs 12 by one man sin entered the world,Adam did not bring sin into the World Satan did with man's permission.
For salvation we are saved by grace through faith in Christ.
For Adam and Eve,as well as man today we have a choice to obey God or not,a Choice to repent of sin or not.
God gave all mankind the ability to choose our destiny by giving us free will.
Satan cannot make you sin ,you always have a choice God will always give you a way to say no.
1 Corinthians: 10. 13. There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.
Deuteronomy: 30. 19. I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live: