For who is this datapack?
If you died somewhere, where you coudn't reach in time and your items despawned, then this datapack is for you!
What it does?
It disables auto items despawn in minecraft
Optimization
This datapack can cause some performence issues due to its expected behaviour: disable item despawn. I tried optimizing it by making it run once every 3 minutes and resetting the item despawn nbt value to 0, but this won't help much.