Can I move toilet waste pipe above decorative moulding outside front door

Hi
I have a problem about waste pipe positioned over the front door
A bathroom was turned into a 3rd bedroom. The toilet and sink was moved to a storage room just behind the 3rd bedroom. The waste pipes were put under the floor. Everything works fine but the customer wants the waste pipe to be lifted above the decorative plaster .
I’ve been advised that is not possible as the waste needs to pass down to the soil pipe outside.

see if you can drop the pipe down into the porch and bring it across the inside above the archway. Then drop it vertically down inside the corner and bring it back outside to the stack at low level.

Thanks very much
Much appreciated