So, on this specified service, I reset 2FA and entered a new email in the appropriate column, to which I naturally have access. Then I received a notification that the recovery process had started. And another message that the recovery process can last up to 2 weeks.
Sorry it wasn't clear to me but what was the specified service? keychainX? or this--https://login.blockchain.com/wallet/forgot-password?
He's talking about their 2FA Reset form, here:
https://login.blockchain.com/en/#/reset-2faAfter filling-up the form, it will show the user this message:

So, on this specified service, I reset 2FA and entered a new email in the appropriate column, to which I naturally have access. Then I received a notification that the recovery process had started. And another message that the recovery process can last up to 2 weeks.
Unfortunately, it's requesting for the associated email and not any other email address.
And their Email Authentication isn't their 2FA code so the reset service isn't going to do anything for your account.
It's only a mandatory authentication that every user has to do to log-in.