how do i change the email address so its the same as my apple id?
i have a google email address (ending in @gmail.com) as my apple id because i use that account literally EVERYWHERE. but somehow my email address on the "name, phone numbers, email" page (in icloud in settings) is an icloud address (ending in @icloud.com). On the mail app, the icloud email is the main account, but it is no use to me because i don't receive any emails from that account. it's set as my primary inbox and my actual email is secondary. when i try to edit the "reachable at" section in settings, it says that it is an alias to my apple id. i don't need an alias and i don't see how it helps me in any way. How do i change my email address in the "reachable at" section so that my apple id is my main email?
ps: i know i can just leave the alias email alone, like it's not doing anything, it's just there. but it bothers the heck out of my OCD
iPhone 11 Pro