Applying layout with appLayout in nuxt config doesn't work

nuxt4

Hey I tried to apply a layout on a route like I saw in this documentation (https://nuxt.com/docs/4.x/directory-structure/app/layouts#changing-the-layout-dynamically)
But appLayout doesn't seen available anymore

Nuxt

Nuxt provides a layouts framework to extract common UI patterns into reusable layouts.

Applying layout with appLayout in nuxt config doesn't work - Nuxt