Can someone make a plugin where you can craft a heart that adds 1 heart to your maximum heart count with 4 diamond blocks, 2 gold blocks, 1 netherite block, 1 elytra and 1 totem of undying. With operator permission you can add or remove a certain amount of hearts for a specific player. This would be for 1.18.1
Please read the Plugin Request Guide first: https://bukkit.org/threads/read-me-first-plugin-requests-guide.81209/
So when you mean custom items, do you mean built in minecraft items (like a log, golden apple, etc) with different names?