MC Functions

There are not really news yet, however this might help you:

Quote from Roman

An easy management system for datapacks is already on our ideas list. Meanwhile you can edit and modify your datapacks here: https://aternos.org/files/world/datapacks

For your first datapack you need to create the folder manually by downloading the world, adding a datapack and uploading it again.

Then you area able to access that folder online.

This depends on the multiworld plugin you're using. Some might support them, some not.

Sorry, I'm not an encyclopedia. Better you have a look at the plugin page und dev.bukkit or you just try it out