Most of what you find when you look for bamboo curtains are actually roll-up blinds. The fact that the bamboo strands are attached in a horizontal manner makes it impossible to use them as curtains. Still, vertical bamboo curtains can be found, and they are beautiful.
Vertical Bamboo Curtains:
Vertical Bamboo Curtains pictured: Master Garden Products Natural Beaded Bamboo Curtain, 36 by 78-Inch
Vertical Bamboo Curtains pictured: Bamboo Curtain in Natural, sold by Wayfair.