What version of Vue am I running in Nuxt 2.14.0?
The current versions of nuxt.js are still using vue 2.6.x, and to make it work with vue 3 main feature (composition api), you should use the module called composition-api.nuxtjs, as you can see in the introduction they say:
@nuxtjs/composition-apiprovides a way to use the Vue 3 Composition API in with Nuxt-specific features.