Installing Datapacks
To upload a datapack to the server, we first need to download it from somewhere. You can find datapacks on websites such as Planet Minecraft, Vanilla Tweaks, and many others.
Next, navigate to the world folder in the server files, and then open the datapacks folder. Here, you will upload the datapacks in .zip format. To do this, click on the File button under the Upload Files tab.
Then select your datapack and click Open.
After this, the datapack should appear in the server panel.
Next, start the server and type the command /minecraft:reload, or if it doesn't exist, use /reload.