Hi @web2h,
The tutorial does not cover access tokens, so I’m not sure if you are talking about the attached sample project or an evolution of it.
Anyway, since your app is a public client, you shouldn’t inspect the access token or care about its format. The API is the designed receiver of the access token, so the access token format is relevant for the API.
In case your API is registered with Auth0, you can enable/disable JWE support through the access token settings of your API in the Auth0 dashboard.
I hope this helps.