You said before that you are acting as a business here, so I don’t think these apply, but just to mention it.

(1) A trader who maintains a website or uses terms and conditions shall, […]

1. […] inform consumers of the extent to which it is willing or obliged to take part in dispute resolution procedures before a consumer conciliation body […]

I imagine there is equivalent legislation for B2B, this one applies to consumer matters.

Or maybe the notice is a catch-all for exactly this law.

DE: https://www.gesetze-im-internet.de/vsbg/BJNR025410016.html#B... EN: https://www.gesetze-im-internet.de/englisch_vsbg/englisch_vs...