Since the delegation is framed as a request, I assume it must be expected that a delegation might be declined. Does the manager accept that and just move on? Raise it another time or let it go?
Assume that one follows the model, heard the concerns and then addressed them in the details...but that didn't turn a no into a yes.
This may not be an issue but after analyzing my top focus areas, this is something I want to get rid of and have someone else take on. Worst case is I am still doing it - not terrible outcome. But I am wondering if there is some behavioral recommendations out there about this.