Disclaimer: Needs to be used in snapshot 25w20a! The /dialog command just has been added to the game.
This Datapack lets you generate any custom item using the standart carrot on a stick. You can input: Item Type, Item Model, Item Name, Count and if it has enchantment glint. Warning: This can be used by any player in any gamemode in the world. Make sure to adjust the tick function to your liking. Its only 4 commands in this datapack.