Welcome, @Liza_Cucco,
I agree with @Tetsuo_Kawakami that the solution should lie in the ED’s setup and use of My Tasks, and it might also be necessary to include a custom field as I think @Taylor_Brooks suggested.
It will take some effort, but I think this approach will not just address already-blocked work (which is a low bar!) but prevent it. And when it does, it won’t be necessary to have the reporting.
Some aspects of the solution are already present in this overall guide for every Asana user’s My Tasks that I recommend to every client organization and every individual, regardless of their level in the organization, though some leaders will need some augmentation or the help of an assistant, manual or AI!
Thanks,
Larry