An oak wood block (via screenshot)
Oak wood or oak hyphae is a block that has the texture of an oak log on all of its sides. It doesn't generate naturally and can only be crafted. You can turn it into stripped oak wood by right-clicking it with an ax.
Oak wood blocks generate naturally in villages, which means that they can be obtained from naturally generated villages, or can also be crafted. To make an oak wood block you will need to place 4 oak logs in a 2x2 manner inside the crafting grid.
Crafting oak wood from oak logs (via screenshot)
Oak wood can be used to make some blocks such as campfires, planks, smokers, and soul campfires. It is also used as a decorative block and building block for player-made structures. You can also smelt it into charcoal which is an efficient fuel.
Crafting a campfire with oak wood blocks (via screenshot)
Oak wood is a craftable block that is used most for decorating and building structures. Since plains biomes are quite common, it is easy to get oak wood. Oak wood is also used for a few crafting recipes such as campfires, smokers, soul campfires, etc.
A. To make oak wood, place 4 oak logs in a 2x2 formation in the crafting grid.
A. Yes, oak wood does generate in plains biome villages.
A. Yes, by smelting oak wood in a furnace you will be able to make charcoal.