I think this confirms my guess above: https://www.docusign.com/how-it-works/electronic-signature/d...
(But they are making it vague on purpose instead of just stating in plain words)
As such, DocuSign is unlikely to be valid as a qualified electronic signature in Germany or other European countries.
But in all of the contractual law ever present in the world, as long as you do not dispute that it's your signature, or there are witnesses to you agreeing to a contract (even verbal ones), a contract would hold as if signed by you.
> ...the use of electronic signatures or requires that the “written form” be used (which requires use of a qualified electronic signature), then any non-qualified electronic signature may be used.
As such, DocuSign is an "electronic signature", but not a qualified electronic signature. This seems to be defined directly in eIDAS, so it probably applies to most of EU countries, and countries on the path to joining the EU.
This has (just searched for a link) been turned into EU law under the term "eIDAS Regulation" [0].
[0]: https://en.wikipedia.org/wiki/Qualified_electronic_signature