TypeScript: Array in nested object seems to be empty even if its filled

i am new to the typescript/javascript frontend world. I have a vue project with typescript enabled.

I am trying to declare a simple typed object and then console.log it to look whats inside. It looks like this:

// an option is a single option that is selectable in the dropdown list
type optionItem = {
  value: string | number
  label: string
}

// an optionsCategory has an array of options and also includes a title for that category and some settings
type optionsCategory = {
  title: string
  options: optionItem[]
  defaultSelection?: optionItem
  isMultiSelect?: boolean
}

const testObject: optionsCategory = {
  title: "Test",
  options: [
    {
      value: "1",
      label: "Option 1",
    },
    {
      value: "2",
      label: "Option 2",
    },
  ],
}

console.log(testObject)
console.log(testObject.options)

The output looks like this.

In the first output console.log(testObject), the options array is empty. In the second, it is filled console.log(testObject.options). Why is that so?

I also tried it out in basic typescript projekt in codesandbox, there it just works: https://codesandbox.io/s/goofy-voice-lk2x32?file=/src/index.ts

These are the dependencies from the vue-project from the package.json, if its relevant.

"dependencies": {
    "@mdi/font": "7.0.96",
    "@mrolaolu/helpers": "^0.3.2",
    "axios": "^1.3.4",
    "date-fns": "^2.29.3",
    "dotenv": "^16.0.3",
    "haversine-distance": "^1.2.1",
    "pocketbase": "^0.11.0",
    "prettier": "^2.8.4",
    "prettier-plugin-tailwindcss": "^0.2.4",
    "roboto-fontface": "*",
    "swiper": "^9.1.0",
    "throttle-debounce": "^5.0.0",
    "vue": "^3.2.45",
    "vue-router": "^4.1.6",
    "vuex": "^4.1.0",
    "webfontloader": "^1.0.0"
  },
  "devDependencies": {
    "@types/throttle-debounce": "^5.0.0",
    "@vitejs/plugin-vue": "^4.0.0",
    "autoprefixer": "^10.4.13",
    "postcss": "^8.4.21",
    "sass": "^1.55.0",
    "tailwindcss": "^3.2.7",
    "typescript": "^4.9.3",
    "vite": "^4.1.0",
    "vue-tsc": "^1.0.24"
  }