If you read between the lines of the verbiage here, it looks like a general archived dropbox of stuff like PDF documents which the onboarding team used.
Since GDPR etc, items like passports, driving license data etc, has been kept in far more secure areas that low-level staff (e.g. people doing merchant onboarding) won't have easy access to.
I could be wrong but I would be fairly surprised if JPGs of passports were kept alongside docx files of merchant onboarding questionnaires.