As far as I understood, you need guidance on removing an iCloud from your iPhone and probably the FMI functionality. Fiddled Everywhere can't achieve that as all system functionalities in iOS are using certificate pinning. That said, no MITM tool (including Fiddler) can be used to intercept the iOS network communication.
In case you forgot your Fiddler Everywhere password for a Fiddler account, then you could use the Forgot Password functionality from the login screen to recover the password of your Fiddler account. Note that Fiddler can't recover or change a password associated with Google Authentication - in that case, you need to directly log in using the Sign in with Goggle option from the login screen.
iphone open menu delete icloud. I need this gor fiddler tool