Hey, zguba said that there might be some

[jade musk]

He's probably referring to the fact that there are a few Explosion-related values in the Global Audio Variables, which you could read out. :)
(GlobalVariables.conf, https://community.bistudio.com/wiki/Arma_Reforger:Audio_Editor:_Audio_Variables)

Explosions_SubMix outputs the current amplitude of, well, all explosion sounds that go into the explosion submix.