A specific manga comes to mind in relation to this, a drama from the 2010's. Though I can't link it in this specific case without spoiling it completely and I'm not about that. Maybe you've already read it and that's why you had the thought?h...ey... what if... she wasn't really reincarnated... ? like what if her "future worthless old-man" self was just her delusion.. that she made up to cope with what she went through... like what if the story narrator is just unreliable type of narrator...
Anyways, I wouldn't mind if the artist is making another go at that concept, but the art is a lot weaker when directly compared. We'll have to see, some chance we're all giving the author too much credit anyways.