Yes. These products are in scope of the regulation and fall under the definition of a rooftop heat pump.
When sold as a single package, the efficiency value should reflect the product's efficiency, including the fossil fuel heater. In the absence of a calculation methodology for heat pumps integrating a fossil fuel supplementary heater, and in analogy with the manufacturer's guide for space and water heaters, suppliers can use the same methodology as laid down in EN 14825 for electrical supplementary heaters by replacing performances of electrical supplementary heater with the performances of fossil fuel supplementary heater.
The supplementary heater of a heat pump needs to be taken into account when measuring and calculating the rated heating capacity, seasonal space heating energy efficiency, sound power level and emissions of nitrogen oxides.
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.