In reply to @uep:matrix.org

I do have this, which I wouldn't expect to be the issue but can test without (a bit later)

  services.pipewire.enable = true;
  environment.etc = {
    "wireplumber/bluetooth.lua.d/51-bluez-config.lua".text = ''
      		bluez_monitor.properties = {
      			["bluez5.enable-sbc-xq"] = true,
      			["bluez5.enable-msbc"] = true,
      			["bluez5.enable-hw-volume"] = true,
      			["bluez5.headset-roles"] = "[ hsp_hs hsp_ag hfp_hf hfp_ag ]"
      		}
      	'';
  };

In reply to @uep:matrix.org

I do have this, which I wouldn't expect to be the issue but can test without (a bit later)

  services.pipewire.enable = true;
  environment.etc = {
    "wireplumber/bluetooth.lua.d/51-bluez-config.lua".text = ''
      		bluez_monitor.properties = {
      			["bluez5.enable-sbc-xq"] = true,
      			["bluez5.enable-msbc"] = true,
      			["bluez5.enable-hw-volume"] = true,
      			["bluez5.headset-roles"] = "[ hsp_hs hsp_ag hfp_hf hfp_ag ]"
      		}
      	'';
  };