Badly planned, how to set up?

It is a bungalow; we also have a guest bathroom with a shower (but it only has about 4 sqm of space). We are a family of four, but by nature, we rarely are in the bathroom together. Usually, we are up before the children and also go to bed later, and if there is ever a conflict, there is the guest bathroom. Two drainpipes are already planned in the main bathroom in the floor slab (see the blue dots in the sketch from my opening post).

Thanks, but the windows are now fixed as they are, meaning a double sink cabinet of at least 1.20m width doesn't really fit between the two windows since there is only about 1.10m space there.

I tried the Villeroy & Boch bathroom planner, but unfortunately I couldn't find a bathtub.

Another quick idea

One more quick idea

Too tight between the tub and the washbasin

What is that strange wooden thing you always draw there? How about a shower and toilet at the bottom of the plan?