dark theme not working on telegram

[hems]

it works by default on WhatsApp but my telegram is still white :(

{
  "host": {
    "platform": "linux",
    "release": "5.8.6-1-MANJARO",
    "screens": [
      {
        "id": 64,
        "bounds": {
          "x": 0,
          "y": 0,
          "width": 1920,
          "height": 1080
        },
        "workArea": {
          "x": 0,
          "y": 0,
          "width": 1920,
          "height": 1080
        },
        "accelerometerSupport": "unknown",
        "monochrome": false,
        "colorDepth": 24,
        "colorSpace": "{primaries:BT709, transfer:IEC61966_2_1, matrix:RGB, range:FULL}",
        "depthPerComponent": 8,
        "size": {
          "width": 1920,
          "height": 1080
        },
        "workAreaSize": {
          "width": 1920,
          "height": 1080
        },
        "scaleFactor": 1,
        "rotation": 0,
        "internal": false,
        "touchSupport": "unknown"
      }
    ]
  },
  "franz": {
    "version": "5.5.0",
    "electron": "9.2.1",
    "installedRecipes": [
      {
        "id": "gmail",
        "version": "1.2.0"
      },
      {
        "id": "googlecalendar",
        "version": "1.0.0"
      },
      {
        "id": "slack",
        "version": "1.0.14"
      },
      {
        "id": "telegram",
        "version": "1.0.5"
      },
      {
        "id": "whatsapp",
        "version": "1.0.22"
      },
      {}
    ],
    "devRecipes": [],
    "services": [
      {
        "id": "dd2f5eae-842a-43ee-bdf3-979c9128eeb7",
        "recipe": "whatsapp"
      },
      {
        "id": "c872b53f-3b3b-444b-8e73-dc648c879364",
        "recipe": "telegram"
      },
      {
        "id": "5ff3474a-83b8-4170-b324-0605201b60c2",
        "recipe": "slack"
      },
      {
        "id": "47cfaed3-f3d9-48e8-bc08-873860e89a03",
        "recipe": "gmail"
      },
      {
        "id": "0749171e-fb2f-4ac2-b3d2-8cfebc31d0fc",
        "recipe": "googlecalendar"
      }
    ],
    "workspaces": [],
    "windowSettings": {
      "width": 1920,
      "height": 1056,
      "x": 0,
      "y": 0,
      "isMaximized": false,
      "isFullScreen": false,
      "displayBounds": {
        "x": 0,
        "y": 0,
        "width": 1920,
        "height": 1080
      }
    },
    "user": "836b8e6d-b836-419b-89a4-d1c4c7ad141b"
  }
}