Ionic Identity Vault and authentication/authorization in Ionic4

I would like to know what is the best current solution for authentication and authorization. I know that Proof Key for Code Exchange (PKCE) is the recommended method for controlling the access between application and a resource server, but I do know if it is already integrated into Ionic 4.

I saw that You got a product Identity Vault, but to be honest I do know what are the features of it.

  1. Is it a solution for authentication and authorization?
  2. Has it some managment control to disable/erase mobile phone when it is stolen?
  3. How it is different than Auth0 or Okta with their Okta Mobility Management) ?