Now I'm unsure and can't check coz I'm not at home near my pc. But it seems to still work. I just login so rarely (because i never logout and the pc is always on)

I quote some random user:

"The Steam TOTP feature is why I chose KeePassXC, and still works great. The only thing people have to do is use a program like mentioned above (Steam Desktop Authenticator) to grab your steam account's shared secret, then convert from Base64 -> Hex, and then from Hex to Base32."

I hate the steam app and don't want to use a stupid app for everything. If neither SDA nor keepassxc work anymore I'd be forced to remove 2fa 😒