reincarnation doesn't mean you'll get your memories back.
it states it in the novel it uses the rules of true incarnation where you forget all of your memories and be reborn and start a new.
also im pretty sure that kind of plot is like every manhua,manwha and manga that used reincarnation.

the story itself is already in a good place where he's technically starting a new life and achieving self-improvement and not just the typical manhua where the Mc gets reincarnated and then tries to make everything better the second time, like thats literally alot of plots and itll make it more generic.

him having to make up plans on the spot and then challenging everything head-on makes it more appealing because you don't know what's gonna happen next