Here is a simple cobblestone generator. There are 5 tiers available in case people wish to add a multiple versions.
This was made mainly as a standalone block to help servers. It's far more performant to have a single ticking TE then it is a bunch and in-world cobble generation.
But feel free to use as you will.
Each tier has settings that can be edited in the server config file.
[server.1]
#The maximum amount of items to hold in the internal buffer.
#Range: > 1
max = 64
#The amount of items to generate every update.
#Range: > 1
count = 1
#The number of ticks between every generation update.
#Range: > 1 interval = 40
#Set to true to enable automatically pushing to inventories above this block.
pushes = true
Thanks Drullkus for making a pretty model for them.
These are the default recipes, but obviously can be edited in data packs.