What is the stated role of the shockwave itself in the creation of the heaviest elements like uranium?

Answer

It plays a distinct role in distribution rather than initial creation for the heaviest species.

While the explosion itself creates the heaviest elements, the shockwave's distinct role concerning these species is focused on distribution, sweeping up the material created in the core collapse and rebound.

What is the stated role of the shockwave itself in the creation of the heaviest elements like uranium?
Elementsupernovashockwave