Nah, if she goes (and its likelier that she doesn't, despite everything) it is much more likely to be next year. If things are so bad in mid-2024 that a leadership challenge looks feasible, it is also likely that things are so bad for the Tories that they are beyond salvation anyway.
Being beyond salvation would not deter all ambition to become PM. It might persuade some of the frontrunners to stay back, but that just leaves room for the Andrea Leadsoms of the world to step up to the poisoned chalice. A lot of politicians would trade in the rest of their careers for 6 months as PM, and others would be willing to gamble that they could right the ship.