If German is not your mother tongue, that’s not a problem. That you probably mean "plaster" by "only facade" can still be guessed.
There are two types of bricks for the wall surface. Clinker bricks as a facing shell are probably excluded here. But they also come as "Riemchen." That’s what they call them when "cut into finger-thick slices." Then you don’t lay them, but practically "stick" them to the wall like tiles. Visually, you can’t see the difference in the wall surface. The costs are also lower but, in my opinion, still not proportional to the increase in value when the house is only "one year old."
A well-suited substrate is a plastered wall only with a normally thick plaster layer on a solid wall. If the plaster is only a thin coating on insulation, that probably won’t work so well.
Honestly, I would probably keep looking until I find a house that I like better. Or is everything else so perfect?