update

.config/wireplumber/wireplumber.conf.d/99-disable-monitors.conf

@@ -0,0 +1,17 @@
+# Disable all monitor sources (e.g. output mirrors) so they don't appear as input devices
+monitor.rules = [
+  {
+    matches = [
+      {
+        device.class = "monitor"
+      }
+    ]
+    actions = {
+      update-props = {
+        device.nick = "Please Be Disabled"
+        device.disabled = true
+        device.description = "Disabled Monitor Source"
+      }
+    }
+  }
+]