Implement Login with Passwordless
Auth0 supports two way of implementing authentication: Embedded Login and Universal Login.
The industry is aligned in that redirecting to the Universal Login page is the proper way to implement authentication in all apps, but in the case of Native Applications, sometimes customers prefer to implement Embedded Login for UX reasons.
You can review the article Centralized Universal Login vs. Embedded Login for more information to help you decide which solution is best option for your product and customers.