Plugin Workflow question

[ppRaistlin]

Hi,
first thanks for your great work. I have hard time understanding the connection workflow for both Android and IOS. Here is what I believe I understood :

1st connection to application (both Android & iOS - no automatic SMS retrieval)

verifyPhoneNumber --> get SMS --> signInWithVerificationId (sms + verificationid from verifyPhoneNumber)

THEN
Android :
onAuthStateChanged() fired --> OK ! Registered on Firebase !
IOS
onAuthStateChanged ?

Then IRL, the user closes the APP completely

.. a few days later, he opens the app again:
Android : onAuthStateChanged fired automatically ?
IOS ?

I guess the complete process is not to be done again ?
Without showing example of code, could someone please explain me the workflow in a casual case ?
Thanks for your help