All It does is replace the portable hellbomb sound effect
I fixed it by repacking it and i dont know what happened to the original author but he stopped updating it
it is also on nexus (I don't know how much longer though): https://www.nexusmods.com/helldivers2/mods/8680
i got some demos aswell

View: https://youtu.be/06wq9Wot8LA

View: https://youtu.be/7QafKcFEgMM