Ore Tree Add-on 1.17+

Not everyone likes to search for ore in Minecraft caves. Searching for ore and wandering in caves is not the most fun for experienced users, so they can use the Ore Tree mod to quickly get ore. The build includes new saplings from which ore trees will grow. Ore will be generated instead of the leaves of these trees.

Five types of saplings are available:
Iron Seedling.
Gold sapling
Coal sapling
Lazurite sapling
Diamond Seedling.

You can grow plants with bone dust or just wait to grow.

Iron Seedling