For a midfielder who is already 32 years old, it will be very difficult, especially since Pogba has been absent from playing football for a long time, it will not be easy for Pogba to be able to find his best performance again.
However, Monaco seems to be betting on it, they are aware of all the risks they take to recruit Pogba and on the other hand, League One is not as competitive as the Premier League so in terms of percentage there is still a chance for Pogba to slowly find his best performance.
It is still unclear what kind of form Pogba is in because he has spent so much time without any match practice. So the only advantage for Monaco is that they are signing Pogba as a free agent. In every other aspect this deal looks a little questionable. But if he really has the desire to keep playing and he is still a talented player Monaco could get good value out of this. And for Pogba any European club would be a good deal and with Monaco he is quite lucky.