IEC standards for products are used as a route to regulatory conformance. No one issue an IEC certification for products, but they might be quoted when certifying to a medical device regulation (e.g. EU MDD or MDR).
Clearly any IP Ingress rating is subject to being maintained according to the manufactures instructions for use (IFU). Also, the product certification is only valid for the period specified in the IFU, once the stated expected life has elapsed then continued use is at the risk of the user.