Can't get KDE Wallet to auto unlock even though I have a blank password

I am trying to get KDE Wallet to auto unlock while also having auto login enabled in sddm. If I set the wallet password to the same as my user password it will auto open when I am logging in manually with my password. However, I understand that having auto login enabled makes it impossible to auto open a password protected wallet.

The solution that I have found on ArchWiki and other places is to set a blank password for ‘kdewallet’ using KWalletManager. This does not seem to work for me. Even though I have set a blank password for ‘kdewallet’, the wallet won’t auto open when using auto login (or when logging in manually for that matter).

How can I have auto login enabled in sddm and get KDE Wallet to auto unlock? I am using arch if that matters.