Moss Block – Minecraft Wiki

A moss block is a natural block that can be spread to some other blocks by using bone meal. Moss generates on the floor and ceiling within the lush caves biome. Moss blocks can be obtained by trading with a wandering trader, who may sell 2 moss blocks for 1 emerald. Moss blocks can be mined using any tool or by hand, but a hoe is the fastest way to break it. In Java Edition, using bone meal on a moss block causes nearby blocks with the base_stone_overworld, cave_vines and dirt tags to be convert

On the minecraft wiki it says that moss can spread to cave vines

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Moss Block – Minecraft Wiki

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On the minecraft wiki it says that moss can spread to cave vines

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