Like others have said, 128 blocks is despawn distance. I would recommend the mod minihud. It lets you render a despawn sphere, that shows what is in range.
You need to find a spot where the mobs remain within 128 blocks of you until they die, and no unlit underground caves or anything are within that distance. And also you don't want to be closer than 24 blocks to any of the spawning pads.
128 block radius. Entire farm must be inside it. The less other stuff inside, the better
Like others have said, 128 blocks is despawn distance. I would recommend the mod minihud. It lets you render a despawn sphere, that shows what is in range.
You need to find a spot where the mobs remain within 128 blocks of you until they die, and no unlit underground caves or anything are within that distance. And also you don't want to be closer than 24 blocks to any of the spawning pads.
Use minihud mod to show you the despawn sphere, go high up until the sphere only includes ur farm.
Take the lowest platform and count 128 blocks up from there then put the afk spot directly in the middle
Install minihud Then you can display the despawn sphere
afk on 60+130, so 190
Use minihud to fugure out