Hi,
I'm the author of https://github.com/ValvePython/steamctl, which can now generate a QR code for Steam.

Issue

When I scan the QR code generated, the entry is created with all the right parameters, except it using TOTP mode instead of Steam. I don't think there is a way to change the mode after the entry is created.

Solution(s)

1. Accept steam type (e.g. otpauth://steam/...). This violates the google authenticator spec. Benefit is that the uri won't work for apps that don't support the new type. By default 5 digits, instead of 6.

2. Make andotp able recognize issuer=Steam and select Steam instead of TOTP. Downside is that if there is ever regular TOTP for Steam, this will likely causes issues.

Workaround

1. Manually create the entry and type the secret

Sample QR code for testing