V-No-Pumpkin-Overlay (Recipe) is a small datapack that is using the equippable Component and the newly added camera_overlay field that allows us to remove the overlay via commands, recipes and etc. without the need of a resourcepack! you can also make custom overlays per item wich is really cool.
There is a 2nd Versions of this Datapack, "LootTable"
Recipe
to get a Carved Pumpkin without Overlay put a normal Carved Pumpkin in a Crafting grid: