I would swap the kitchen and guest room and place the dining table at the bay window
I still don’t find the position of the couch happy. I would put the dining table there if I already have the bay window.
I would sympathize with that too, but that is a matter of taste, so subjective. Objectively economical, however, is when the kitchen with all the pipe stuff is on the side of the utility room, WC and bathroom.
Washing machine should be upstairs anyway... and I see the sliding door the same way...
My late grandma would have said now: "You are crazy, my child." I don’t see any space to spare in this house, especially not the imperial box in the gable for the washing machine. On the adjacent wall the child will later have their bed, and the dressing room at this point can then probably be needed.
Now the question is... whether you can integrate a pantry well into the kitchen... I can’t imagine that... and as I said, this option to pack everything into the utility room... I find horrible... I don’t put food next to the heater... no way
“Integrate” probably means here “replace with a kitchen cabinet”? – no, the (separate) pantry on the north side is exactly right. I stick to my old proposal

with the deviation to swap the positions of pantry and WC, that is, to put the pantry directly on the exterior wall.
You do know that with underfloor heating it still gets warm everywhere?
In rooms where there isn’t any, it won’t get warm either.
Swap washbasin and toilet -> toilet under the skylight, remove wall stub
I agree, except for “toilet under the skylight” – unless that is expressly desired as a pee-sit argument.
I would also like to turn the tub away from there so that you can get up straight from it (the head height in the middle of the tub should be about one sixty).