We CE Mark and our Authorized Rep hasn't said anything about it, nor has our ISO 13485 registrar.
1. AFAIK EC REPs don't have any prescribed regulatory oversight obligations concerning the (EC-external) manufacturers that they represent. They merely serve as a primary go-to address for EC authorities, plus they have registration obligations in some contexts. What I'm getting at is that your EC REP is not necessarily a reliable source for understanding your EC regulatory obligations, as a manufacturer. Some are knowledgeable, but the most just provide the minimal service that the regulation requires of them.
2. Similarly, an ISO 13485 registrar wouldn't necessarily know too much about it. ISO 13485 certification can serve a MDD compliance, but it's not directly related to other EC directives.
But - we have a couple of customer who want a statement that we are REACH and RoHS compliant.
Customers are of course entitled to ask for whatever they desire.
REACH is a massive, complicated regulation and its applicability to a specific manufacturer/device combination depends on several factors.
@Meddevstarter:
It's difficult to pin-point the relevant obligations under REACH while having so little information about the company, the products and the marketing routes.