No. Removing wastewater is a different function from supplying clean water under pressure. Weak shower flow and slow drainage need different enquiries.
What the observation means
A bathroom can contain separate pumps for those jobs. Their names or locations may be confused, particularly in a newly occupied property.
A useful next step
Describe the actual symptom and identify accessible equipment labels. Do not adjust the wastewater unit to solve poor incoming flow or add cleaning products to an unidentified pump. Appropriate service selection begins with the role the equipment performs.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.