Here is a simple rocket launcher data pack I've made.

To use the data pack, put the command "function rocket:functions" in a repeating command block.

To get a rocket launcher, use the command /give @p minecraft:carrot_on_a_stick{display:{Name:'{"text":"Rocket Launcher"}',Lore:["\"Fires Rockets\""]}}

There is also a resource pack file in the same location as read me, which should be put in the resource pack folder. The resource pack requires Optifine.

This is not my first data pack, but it is the one I am most proud of, so I would like any feedback you can provide.