Can't establish an EA to Steam connection!

TerraHMR​ This one is a bit tricky, (so please read carefully):

For updating your old EA Account's email address, you can contact EA Support to recover that old EA Account:

• EA Help | How to get back into your EA Account

Afterwards, you would want to update the email address on that old EA Account instead of deleting it as your Apex progress and data is stored on that old EA Account, (and even if you no longer care about Apex, your BF6 progress and data may also be saved on that old EA Account as well, (which would mean that the deletion of that old EA Account would be a deletion of your BF6 progress and data)).

Note: With the 2FA being in place on the old EA Account, it may be tricky, (or impossible), to recover that old EA Account.

However, if you play BF6 on your new EA Account, (and you do not care about your old EA Account's Apex progress and data), then you can either delete your old EA Account or unlink the Steam Account from it after you recover that old EA Account.

Note: Keep in mind that switching platform links around will not transfer, (or merge), game progression, data, achievements, etc. from one EA Account to another, so if you play BF6 through Steam, then deleting your old EA Account, (or unlinking your Steam Account), would cause an issue with your BF6 progression and data if that is stored on the old EA Account.

If any of the above was confusing, (or I had misunderstood something), feel free to ask questions.

I wish you the best of luck with recovering your old EA Account!