Feels like I've tried everything now; there's also an object called "Max Attenuation Radius" where you can reference the AkEvent directly, but both options gives the 0 value.
I can't find any way to reference the Ak Event itself into the "Get Attenuation Radius" as it's asking for a Ak Component reference.
The math behind it should be "AttenuationScalingFactor * AkAudioEvent", so I tried to set the AttenuationScalingFactor to 1 before triggering the debug and also printed a string out to make sure that was set correctly, but still I only get 0 as a value for the "Get Attenuation Radius".
Could it be a bug, or am I missing something crucial here?