yikes, that is a really small picture, not sure if you're going to be able to see it very well. I was also only able to add one pic, couldn't add the master plan, sorry. Again, new at this :(

What does your bathroom designer/planner say? Some people use a half glass wall and not a full sliding door. Some people cover the window with a shower curtain to protect it during the shower and open it when done. https://www.google.com/search?rlz=1C1CHZL_enUS746US746&tbm=isch&sa=1&ei=yM7vWp-hO6zBjwS3qIagDw&q=window+in+shower+area&oq=window+in+shower+area&gs_l=img.3..0.13316.16233.0.16795.13.8.0.5.5.0.140.870.2j6.8.0....0...1c.1.64.img..0.13.919...0i67k1j0i8i30k1.0.iqupY9kRf68#imgrc=_

This is one attempt. I am not familiar with the regulations nor the dimensions of europeean appliances/bath fixtures etc. This might not work, I don't know. Maybe the distance between the toilet and the bidet is too far. I placed them that way so you don't see them when you enter the bathroom but it may not be practical. Also I wonder if the shelves you have in your kitchen are inside the pillar. In the floor plan below, I completely remove the shelves: If you don't need the powder room:

Well it's hard to figure lighting if drawings aren't accurate or noted well, and when plans aren't thought out well enough, but "just adequate," I often hear "it's too difficult to change that now," but continuing with all that money and human capital (stress, choosing, scheduling, installing tile, etc etc) eventually leads to regret in "should've done it another way when I had the chance." But maybe you have the perfect layout, so then . . . Because you have the shower and toilet wing walls creating "darkness," I would consider the vanity lighting as part of the main lighting, on the same switch. So the vanity, shower can, and can in front of the shower all switched together. The location of vanity depends. Standard toekick, furniture style, or floating? You will have 2.5' of extra space to either fill or make symmetrical. What kind of lighting and feel of the space do you want? Sconces? Over-vanity style (hollywood lights lol)? General throw of 6" or 4" cans or tighter cones of 3" trims? Ductwork/piping in joist spaces and ceiling height? Dark matte/bright white glossy tile everywhere? That all makes a difference on how many/where.