Identify the model before requesting a disposer repair. A food-waste disposer processes permitted scraps at the sink opening, while a separate kitchen wastewater pump moves discharged water where the drainage arrangement requires pumping.
What the observation tells you
Both can be under a sink, and descriptions such as waste unit are easily confused. Their permitted materials, controls and service procedures are not interchangeable. Do not feed food into an appliance merely because a pump accepts wastewater from a sink.
A useful next step
Send a wider photograph and the accessible label to the repairer. Confirm the appliance type and service scope before applying any advice written for a grinding disposer.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.