Changed email address now can't access order history - FAQs say missing orders can be added to account, but there is no option to do so?

I changed the email address associated with my account and stupidly didn't quite notice the message that said I'd lose access to my order history. I had a look around and on the FAQ page here: https://www.dell.com/support/contents/en-uk/article/esupport-order-support/frequently-asked-questions under My Account, it clearly says it's possible to add other missing orders into an account:

• Can I consolidate separate "My Account" registries into one?
  • You cannot automatically consolidate or combine multiple "My Account" registries into one.
  • You can manually update one of your “My Account” profiles to include the separate customer and order numbers from the other accounts.
    1. Open: My Account.
    2. Enter your username and current password, and then select Sign In.
    3. Under "My Orders" (first option on the right side), select "Order Status."
    4. Select "Find Missing Orders" (option on the bottom left side).
    5. Fill in the required fields.
    6. Select "Add Customer Number."

However there is no such "Find Missing Orders" option at all.

I'd really like to be able to access my order history with this current email address, and given that even the FAQs say this should be possible, it seems like an oversight. I can provide plenty of  security information to prove that the orders were ones I placed.

Is there any way my orders (I only have two) can be manually re-associated with my account after I changed my email address?

Many thanks