On the iPhone I also have ADP enabled, so this complicates both security and Apple account recovery. Personal use: I see everyone has iPhones but uses Gmail. Why? Gmail collects more data to profile you with advertising, Apple does not. I also have Tutanota and ProtonMail, but I would like to use iCloud Mail.
I use iCloud for Drive and stuff, but for email I only use Gmail (Apple Mail for Apple stuff only). For social media I use Gmail. I've been stuck for months, I don't know what to do, especially if I lose or break my iPhone, my only Apple device. and I can't buy another one, never lost or broken a phone in my life, I'm always attentive as if it were a child