You seem to be conflating the two different, incompatible meanings of "digital signatures" here.
This article is about digital signatures as in digital pictures of a signature. There's some support of them in, for example, some PDF tools. These do not have a legal status in EU.
And there are "digital signatures" as in cryptographic digital verification of documents using private/public key cryptography. This is the type of digital signatures for which EU has a legal status, and in many countries a support for verifying identity - for example, I can cryptographically sign documents using the chip on my gov't ID card, and if I receive such a document, then I can securely verify the identity of the signer without needing any preexisting relationship with them. But this has nothing to do with the pictures of signatures that this article is talking about, that seems to be more like a USA thing.
This article is about digital signatures as in digital pictures of a signature. There's some support of them in, for example, some PDF tools. These do not have a legal status in EU.
And there are "digital signatures" as in cryptographic digital verification of documents using private/public key cryptography. This is the type of digital signatures for which EU has a legal status, and in many countries a support for verifying identity - for example, I can cryptographically sign documents using the chip on my gov't ID card, and if I receive such a document, then I can securely verify the identity of the signer without needing any preexisting relationship with them. But this has nothing to do with the pictures of signatures that this article is talking about, that seems to be more like a USA thing.