SimpleStack
This mod solves the common problem of small stack sizes for certain items. The developer focused on objects that could traditionally only be carried one at a time, which wasn't very practical from a gameplay perspective.

The main improvement affects minecarts and beds of all color variations — now they can be stacked in multiple units simultaneously. This significantly simplifies construction and transportation of these objects in the Minecraft world.
The mod's key feature is its flexibility. Users can customize stack sizes for any game items themselves through the simplestack-common.toml configuration file.

Configuration is done through simple editing of the configuration file, where desired maximum item quantities for any type of blocks or items can be specified.