Hello Lauren and welcome to the Cove.
This is just a general comment on your question.
Distributors (initial distributors) are generally regarded as manufacturers by the regulatory requirements, so the same requuirements that manufacturrs have, with some modification and interpretations, are applied to distributors. This means that, for example, a quality system regulation might be applied to distributors.
In Brazil, although not enforced, it´s expected that distributors adhere to Good Manufacturing (Distributor) practices according to RDC 59, the same regulation applied to manufacturers. If you take a look at 21 CFR 820, you will see that it applies to initial distributors also.
Regarding secondary distributors, this is not so clear, but it´s generally expected that they have similar requirements.