pockie3 Usually a ban only applies to a single game, not to the entire EA account.
That said there's probably a piece of software installed on the PC which triggered the ban. Unfortunately and somewhat understandably EA won't say what software triggered the ban because they don't want the cheat developers to know.
I would completely format and reinstall Windows before attempting to play any EA games again. If you don't do this EA might end up banning you again because the piece of software that triggered the ban might still be installed.
Unfortunately there's no way to know what software is triggering the ban. Usually post-process filtering software like ReShade or antivirus software such as Malwarebytes can trigger EA anticheat. I've even heard fan control and RGB software such as Asus Armory Crate can trigger EA anticheat. I'd be scared to run any overlay software such as MSI Afterburner or even HWiNFO. Gamepad emulation software such as DS4Windows is another one I've heard causes issues.
EA's anticheat developers claim a 99% accurate false positive ban rating, but I don't believe it.
You may even consider creating a separate dual boot partition on your hard drive just for playing Battlefield, or install Windows and Battlefield on a second dual boot hard drive. Then install the minimal amount of software such as only GPU drivers, EA app, and Battlefield. Also make sure Secure Boot is enabled in BIOS to prevent unsigned drivers from being loaded.
If you do decide to go this route make sure to write down the Windows Product Key before formatting.
https://www.fortect.com/how-to-guides/how-to-find-your-windows-10-product-key/#:~:text=Select%20and%20run%20as%20administrator,product%20key%20will%20be%20displayed
I would of course try to appeal the ban to EA's Terms of Service team, but I've only heard of a few people being successful. They allow 3 ban appeals before closing the case.
https://help.ea.com/en/help/account/information-about-locked-or-banned-or-suspended-accounts/