Poor floor plan T-solution? A large shower would be desirable

You are uploading a floor plan here that is not even fully dimensioned. Then this floor plan has a layout ... what exactly bothers you about it? And then the fundamental questions, see post 2.

The bathroom and the kitchen will not be changed.

Now I really have to laugh ... this is not how you create house floor plans. And I wrote you something about the kitchen, it is a very poorly planned room.

You are posting a floor plan here that isn't even fully dimensioned yet.

Then this floor plan has a layout... what exactly bothers you about it?

And then the fundamental questions, see post 2.

What do you mean by that?
According to the architects, the floor plan could be submitted for the building permit.
All the data is included.
Sure, we want to adjust the bedroom, the technician, and the hot water tank a bit, but more or less we like the floor plan, or what is not quite fitting yet?

The bathroom floor plan here in the thread is not fully dimensioned. Should everyone first gather everything together? My God, sorry but in your house planning there are still so many question marks over the floor plan to the budget. If you change a little here and a little there, it usually has effects elsewhere or worsens the floor plan.

The bathroom and the kitchen will not be changed. They are completely fine for us as they are. Therefore, I would be very grateful for ideas.

You want to change something fundamental (bathroom) or make it stylish without adjusting/changing anything else if necessary. Change usually only works with change elsewhere, and sophisticated design can only succeed with a willingness to think freely. Otherwise, there are only limited options in your current bathroom layout. The location of the door is already inconvenient, you cannot place a toilet just anywhere, etc..... My idea: Just respond to the hints or "requests" of the participants here and then you will get a better result.

You want to change or design the basics (bathroom) stylishly without having to adjust/change anything else if needed. Change usually only happens with change elsewhere, and sophisticated design can only succeed with a willingness to think freely. Otherwise, there are only limited options in your current bathroom layout. The location of the door is already unfavorable, you can't place a toilet just anywhere, etc..... My idea: Take the hints or "requests" of the participants here into account and then you'll get a better result.

Yes, everyone here thinks they know better, but the architect, no matter what I tell him, always has arguments that it doesn't fit and that it's okay as it is.. I don't understand anymore what's right or wrong... where could the door be placed?