This data pack only adds recipes. It needs the Supplementaries mod, which provides the quiver item. Without Supplementaries, there is no quiver for the recipes to make.
Adding it to a new world
1. On the Create New World screen, open the More tab and click Data Packs.
2. Drag the data pack file onto that window, or click Open Pack Folder and place the file inside.
3. Move the pack from the *Available* list to the *Selected* list.
4. Click Done and create your world as usual.
Adding it to a world you already play
1. From the main menu, select your world and click Edit, then Open World Folder. You can also browse to your saves folder and open the world's folder.
2. Open the datapacks folder inside the world folder, and put the data pack file there.
3. Load the world. If it was already open, run /reload instead.
4. Run /datapack list to confirm the pack shows as enabled. If it is listed but not enabled, run /datapack enable followed by the pack name exactly as the list shows it.
The pack works alongside Supplementaries without changing any other items, so your existing builds and inventories are not affected. Once it is active, the two new quiver recipes are available in that world.