Badges update automatically and link to the mod page on MineUniverse.

All items are stackable by default to 64, they get updated once they're in your inventory
All items that are normally stackable up to 1 or 16 are now stackable up to 64
/trigger bigger_stack_size.config
If disabled in the config, all items will reset when you split them up in your inventory
Edit this file:
datapack/bigger_stack_size/tags/item/stackable.json
Name the item "unstackable" with an anvil
/trigger bigger_stack_size.update_items
Updates every item in your inventory, make sure to not have items that have custom data you don't want to loose (e.g. from other datapacks)
--> All of them are stackable up to 64