ᐅ New Construction Upper Floor Bathroom Layout – Feedback?

We have nearly completed the design of our town villa. However, I am still unsure about the layout of the bathroom on the upper floor. Because of the ventilation pipe from the toilet flush, a wall cladding will be necessary, which I find less than ideal. What do you think would be the best way to handle this? I would appreciate any tips and suggestions, and am also open to alternative floor plan options.

Floor plan with hallway

I didn't know that a toilet needs a vent pipe.

strip ventilation

You don’t need to make your ventilation duct stand out with color. If you simply paint the duct white, the same as the adjacent wall, it won’t be noticeable at all.

Regards,
Sabine

How thick is such a pipe? Can it fit inside the wall?