No `Monitor of` device in device list

Description

missing Monitor of *my main sound card* in the device list, it was there in version 0.26.x I remember? if I stream audio though AudioRelay Speaker and set system audio output to it, only my phone will have the audio. I want both pc and phone play audio

image

my pipewire config:
~/.config/pipewire/pipewire.conf.d/10-audiorelay.con

context.objects = [
    { factory = adapter
       args = {
           factory.name     = support.null-audio-sink
           node.name        = "audiorelay-virtual-mic-sink"
           node.description = "AudioRelay Mic&Sink"
           media.class      = "Audio/Duplex"
           audio.position   = "FL,FR"
       }
    }

    { factory = adapter
       args = {
           factory.name     = support.null-audio-sink
           node.name        = "audiorelay-virtual-speaker-sink"
           node.description = "AudioRelay Speaker"
           media.class      = "Audio/Sink"
           audio.position   = "FL,FR"
       }
    }
]

Devices

PC:
asrock archlinux with Pipewire
AudioRelay 0.27.5

I am also having same issue .