Update Update Update:
After being unable to verify, I have given up. The verification process is insane. It puts a crazy amount of requirements on the consumer. I had invoices for the account all the way back to 2017, and had many details for the account. But because I cannot remember what DOB or secondary emails I had on the account, or the fact that the creation email was deactivated, the account cannot be recovered successfully. I had the account since the Origin days, and have since forgot what information may have been on the account.
I couldn't even unlink my steam from the affected EA account because I cannot verify ownership. The EA help chat is not helpful and full of copy/pasted messages. Having the agent tell me, "I genuinely think this is your account, but I cannot give it to you because of the system" is humiliating. This whole process is a humiliation ritual. I have since requested refunds/remove EA games from my steam account as I can no longer play them because it's linked to a hacked EA account.
I really wish EA would fix or update their system and policy on account recovery.