The shop configuration is not intended for the end-user, but for demonstration purposes in highly luminous environments specific to retailer shops. Therefore, the regulation does not require the shop configuration to have an ABC function enabled by default provided it is not intended to be the 'normal configuration'.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.