I have 2 bathrooms. Do they both use the same sewer drain? Thank You, GulfCoast

Normally, In most homes ( did not say if this was a home or business, or what)
But in most there is only one sewer main from the house to the city sewer ( or one main to the septic tank) There will be a larger pipe under the house where all of the drain pipes from the entire house go into ( will have separate vents)

Are you having some sort of problem?

Hey Gulf Coast, Sarasota here.

Do they both use the same sewer drain? It depends on location, If they are back to back the answer may be yes but as a rule each toilet has its own drain line connecting to a common main. Does that answer your question? Tom