Are the magazines from RBF digital (the Revue Bancaire et Financière)? and DBF digital (the revue Droit bancaire et financier) also available separately, or only through a subscription?

You don't need to subscribe to RBF. You can simply access the articles via this website.

For DBF, a subscription is necessary. Currently, individual articles from DBF are not available. It operates on a yearly subscription basis.