It may require a different specialist from a conventional domestic range. Similar size or traditional appearance does not establish that it falls within this service's scope.
What the observation means
Heat-storage, fuel and control arrangements can differ substantially. The stated exclusions include AGA repairs; a general cooker page is not an offer to work on every range-type appliance.
A useful next step
Provide the exact make and model at first enquiry. Use the appropriate specialist route where required. Do not apply conventional cooker instructions to a different heat-storage design based on appearance alone.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.