Important note: Make sure to place the observer correctly. An observer observes the block that it's placed against. I somehow overlooked this detail and it didn't work...
Yeah I just started getting into farms on my world and I messed up 3 iron farms a xp farm and a auto crop until I learned you can crouch to place stuff the right way like hoppers and observers 😭😭😭
I searched bedrock farms this came up and does not work . Edit: You need to remove the rail after you place the minecart dig a hole beside it and squat down then mine the rail away and cover the hole back up. Edit again for the third time I parked beside it for an hour and I did it 6 times each chamber varied between 6-8 pieces of wool you would be a lot quicker at getting more wool just doing it by hand tbh.
How do you get this to actually work without command blocks? As of 1.20, when a sheep eats grass to grow wool, there is no block update, the grass block doesn't become a dirt block, so the dispenser doesn't activate.