No. Multiple-pump systems can have operating and alarm arrangements that need their own interpretation. One active motor does not verify every function.
What the observation means
The model may alternate, assist or respond to particular conditions. An owner should not disconnect one pump to test the other.
A useful next step
Record the control indications and ordinary observed sequence. Stop contributing wastewater where clearance is uncertain and follow the alarm instructions. Appropriate assessment should establish the condition of the complete system rather than treating one audible motor as a pass.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.