Thank you @dawid.matuszczyk .
I’m sorry for the unclear explanation.
I’m developing a website with Nuxt.js as the frontend framework and Laravel as the backend API framework.
(This diagram was originally used by another user, but Iet me borrow it because it fits my use case.)
In Auth0, I made a SPA application for Nuxt.js, and Machine to Machine application for Laravel.
(I’m not even sure if this is the right way to do.)
In this situation, Auth0 is unable to determine that the SPA and the Machine to Machine constitute a single website.
This is what I’m worrying about.