Thank you for the explanations.
I found some pictures using the search term "fargesia eingerollte blätter" and then image search on the big machine. Admittedly, more close-up shots or individual plants, never an entire hedge. But it still looked very dense and bamboo-like. I at least find Fargesia rufa nice based on the pictures. It is also quite affordable. But are we still on topic here? I mean, basically it's still about privacy screening...