Currently there are no integration/functional tests for the app. The main reason is that it's not possible to to mock/stub the Auth0 auth flow that uses PKCE (nor should we want to!).
But I think it would still be very useful to test (parts) of the app using cypress.
A possible approach to achieve this could be to render a "custom" app (using the same components) but without any auth. But only if this adds value and confidence.