There are plenty of mature front end SPA frameworks that would work perfectly fine with Adonis. If you want to build traditional server side templated pages they provide a templating engine called Edge, and the docs tell you how to use Vite to bundle assets. If you want to make pages feel like an SPA without using a framework, they suggest Inertia as another comment points out. What do you feel is missing?

Did you even check the docs? Or just reading the title was enough to drop your opinion?

How? It claims to support InertiaJS.

Be real, you want to build a SPA, how ?

We can’t read the docs for you.