>Only problem is that when she entered the email address in the login page, she didn't get any verification email
This is a real problem, and one that we have seen repeatedly with our clients.

One of the potential issues (that Blockchain.com mentions here: https://support.blockchain.com/hc/en-us/articles/4417092364180-I-am-not-receiving-email-notifications-What-do-I-do-) is that email addresses are stored in a case-sensitive format in Blockchain.com's database. So, if you try to login to your Blockchain defi wallet with the email address "abc@example.com" and you initially configured your email address as "Abc@example.com" then you will not receive an authorization email.

It doesn't sound like this is the OP's problem as they also tried to log in with their Wallet ID.

The last ditch solution is to change the email address associated with your wallet. This article covers troubleshooting the problem, as well as how to change your email: https://cryptoassetrecovery.com/posts/not-receiving-blockchain-authorization-emails