The storage, distribution, installation and servicing of medical device...
That is a supply chain partner.
They would not have access nor responsibility to the usual file prescribed by 4.2.3, which is located at the legal manufacturer. The crucial takeaway from the clause is that the information relevant for a device is usable similarly to a DMR (to get this, do this), though not with such a nice sequence to it.
Installation and servicing, as well as competence evaluation instructions thereof are key, but would be provided and should be controlled as external documents, with arrangements to be kept up to date and select the right version/variant of device if applicable.
Should measurement be crucial, such as for devices that require calibration, those instructions and standards should be similarly controlled as well. Storage and shipping instructions would also be expected to be available linked to the product (if these are crucial).
Another set, usually not provided by the device manufacturer, should deal with relaying information for the devices: complaints up-chain, field safety notices etc downstream.
As for evidence of conformity, it would not have any direct means. It could request the relevant CoC/certification documentation (e.g. the EU Declaration of Conformity and the product list) of the device and verify it is on there. To be honest, this requirement depends far more on the regulatory regime whether it is representative of an actual requirement (in EU MDR it is).
Note that for the upstream component/raw material suppliers most of this would be provided by the purchase order specifications as usual, and far less or no device specific things would be expected.
When entire (sub)assemblies or devices are (contract) manufacturered it would tend more to a traditional DMR. However here that is not the case.