Can I create working procedural AudioVolumes via C++ or BP?

I’m able to generate an AudioVolume in C++, assign a reverb, etc., but it seems that nothing I do can create or assign a Brush so that the reverb volume functions properly. Is this actually possible at runtime? And if not, what are my options to add reverb to a level post-generation?

I’m trying to do the same thing. Any help is well appreciated.