[1697] Unable to access Vue instance properties in asyncData

Using the instance properties approach in a plugin, and after registering that plugin in nuxt.config.js, I'm unable to access those properties in asyncData:

export default {
  async asyncData({ app }) {
    console.log(app.$myVar); // === undefined
    return {};
  }
}

Probably related, I can't access any $variables on app. Here is what app consists of:

// console.log(Object.keys(app));
[ 'router',
  'store',
  '_nuxt',
  'head',
  'data',
  'beforeCreate',
  'created',
  'mounted',
  'watch',
  'methods',
  'components',
  'render',
  'staticRenderFns',
  '_ssrRegister',
  '__file' ]

But of course, the context docs say I should be able to.

The root vue instance that includes all your plugins. For example, when using axios, you can get access to $axios through context.app.$axios