And making the choice of the construction partner dependent on marketing material or even on the offered smart home solution would never have occurred to me
That is already good and makes me happy, but I still see the danger:
whereas in this particular case I would like to use the downtime while waiting for feedback from the first consultation talks and regarding the property to at least basically inform myself about things that will sooner or later be relevant anyway.
That sounds so tempting like "then you have already taken care of it, sooner or later you will have to deal with it anyway." but: as long as you still have to keep basics in mind / have them, this is rather a counterproductive defocusing, that’s why I warn.
From my own experience, I can only advise to address the topic early and by no means rely on being able to properly consider this topic "during sampling" or "doing it together with the electrician on site"!
Right - this other extreme must of course also be avoided.
At the moment it looks like a general contractor / prefabricated house builder. Doing it yourself / self-awarded is out of the question since I neither have the time nor the experience for it.
Build (then all the more) rather with an architect, and also have them do the tendering and construction management.