Here is my fully automatic sugar cane farm. It uses an RFtools sensor to tell when the sugar cane is 3 blocks tall, then it pushes the blocks out behind the sugar
Minecraft: Automatic Sugarcane Farm | (NO ZERO TICK) Easy Tutorial (1.15+) | Minecraft farm, Minecraft automatic farm, Minecraft blueprints
Minecraft: Easiest Automatic Sugarcane Farm! [1.16-1.17] - video Dailymotion
an easy sugar cane farm, you need: 16 observers, 16 pistons 16 sand 16 redstone 48 building blocks, 16 sugar cane, running water, a hopper and a chest. : r/Minecraft
How to Make a Sugar Cane Farm in Minecraft (2022) | Beebom