Sudden thought

I just had a thought

I have read many rofan isekai manhwas of different settings but I've never read a manhwa where mc reincarnates as the og novels ml-fl's daughter. Like yk what I'm saying? They're always reincarnated as the children of mostly single parents or powerful figures who weren't relevant in the og story. It'd be nice to read some of this setting.

Like the og story ended with the ml and fl having a child right. Then someone gets isekaid in the ml-fl's child's body. And obv since they Reincarnated in the time that's after the og story's ending, the mc doesn't know the future. And we see the future unfold, also the og ml-fl's life after the og ending. I'm not sure if something like this already exists, if it does please suggest me. Because I feel like we've seen a big detailed version of the og ml-fl's life after their happy ending, only in "Happily ever afterwards". Mostly we see a vague description as they aren't relevant to the story. I'd love to see more of theseeee