Currently, the docs only state how to upload one file at the same time. It would be useful to provide an example on how to upload multiple files in an embedded form, so that one does not have to create several input fields.

This forum post states a solution on how to implement the example:
https://forum.camunda.org/t/how-to-upload-multiple-files-in-embedded-form/2072

It could be either described here:
https://docs.camunda.org/manual/7.5/reference/embedded-forms/javascript/examples/#upload-large-files
or added to the example repository:
https://github.com/camunda/camunda-bpm-examples

Either way, the example should be referenced in here:
https://docs.camunda.org/manual/7.5/reference/embedded-forms/controls/files/#uploading-files