For the normal "Signature" field you can repeat the field when you have multiple documents to sign.
Let's say you have 10 documents, you can repeat the "Signature" field and click "Next" to easily add your signature to the next pages.
For the more advanced and more secure "Digital Signature" field you cannot repeat the field at this moment.
Sometimes official documents with an advanced digital signature need to be sent to for example 100 people.
At this moment we can only do this efficiently for normal signatures, but they don't have the same legal value as digital signatures.
So Adobe Sign provides no solution to quickly sign 100 documents with a digital signature. Or you have to send 100 separate requests and the signer who can be a director need to manually sign 100 times and take 4 hours to do this.