No I am not speaking from personal experience.
Compound ankle fractures are "bu99ers" and to have pain after 12months is not unusual.
The plate will only be removed when there is reunion of the bone ends (not always achievable in these types of fractures) but if the surgeon is willing to remove the plate then union has taken place.
In my opinion, removing the plate will not improve the pain that
you are still getting and that pain may well need extensive physiotherapy.