Steam account overwrote progress from EA account

Hello there,

I was surprised to find out that, after I bought Battlefield 6 on Steam, my EA account while still connected to Steam now is overwritten with a dummy account that's level 1.

I officially played the Battlefield 6 BETA fully until level 20 and also had unlocked all the bonus tasks. However, my in-game account is stating that I am now using "STEAMUSERNAME" as my account instead of my EA account which is PenSnS.

I could not find a answer on how to solve this issue, and have contacted EA support about it as well. If anyone has encountered this issue and knows how to help me here, I would really appreciate your help.

(Yes just to confirm, I made sure that this is indeed the account used in the Beta and that it was also linked, just to not cause any confusion here.)