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
Created an auto sugarcane farm underground, nothing is growing? : r/Minecraft
EASIEST Way To Get Sugarcane In Minecraft! - Fully Automatic Sugarcane Farm! - YouTube
How to Make a Sugar Cane Farm in Minecraft (2022) | Beebom