Hi @richpeers ,
In the board settings you can indicate any status as “Done”. If you do this, the My Work view will recognize that status as done. The only downfall of this is you will need to go into each board to do this, and depending on how many boards you have that may be a larger task.
To update which columns are “Done” see the screenshot and instructions below.
Status Column → Three Dots → Settings → Customize Status Column
Hope this helps!