Our scouts are roaming the announced locations, but haven't found a shovel of gravel nor a flip of construction-do-not-cross-line. Nothing. Nada.
We didn't have a winter this time. Not one inch of snow anywhere the Autobahn network stretches. No freezing. Cities saved a fortune on salt and road repairs from frost this winter.
I don't know if construction companies charge a surplus on excavation work if the calendar says "It's Winter", or if based on outside temps, or if the ground truly is frozen, or if at all. I don't know if Tesla is waiting for construction to become possible/cheaper - they didn't mind last November, and pressed hard.
All the other residential construction in my neck of woods didn't halt a single day the whole winter, be it excavation, pouring concrete, or laying shingles on the roof.
Tesla must pull a major one here, if they want to keep the promise to double the number of superchargers in Germany every quarter. That would be 12 new sites, and they are quickly running out of quarter.