This is nothing more than extracting the file from assets to a folder like "data dir" then loading it in memory using System.load() function. Used library for this example can be found in this project ...

Verity-JE-Mod-Minecraft brings new content to your Minecraft Java Edition game. This modification adds custom items, blocks, and gameplay mechanics. It works with both Forge and Fabric mod loaders.

Minecraft is a sandbox game that allows you to install all kinds of mods. Mods are third-party software that contains additional features that usually aren't available officially in the game. These ...