Mfa not required after logging in and logging out immediately

Hi Good day Im trying to look for topics related to this but unfortunately cannot find any
I want to investigate the given behavior on how 2fa login is required in IOS devices
we are using react-native-auth0
steps to reproduce

  1. enable 2fa
  2. login using ios
  3. use 2fa pin from ios password settings
  4. login success
  5. logout
  6. login again
  7. login success without requiring 2fa again

can someone provide any related topics to this
if this is the expected behaviors for IOS devices