Is creating virtual microphones disabled on Omarchy

[aastikn]

So I had an idea that for audio sharing using firefox I could create a virtual mic that would input both my mic audio and my screenshare audio, so I could screenshare audio on gmeets.
I've tried creating virtual microphones or nodes using helvum, qpwgraph and this particular command.

pw-cli create-node adapter '{
  factory.name = support.null-audio-sink
  node.name = "Virtual_Mic"
  node.description = "Virtual Mic (System + Mic)"
  media.class = Audio/Sink
  audio.position = [ FL FR ]
}' 

and none of them worked. This made me wonder if creating virtual microphones or audio sinks was restricted or if there's a specific method to do that.