Yes, you can indirectly grow moss carpet with bonemeal. Using bonemeal directly on moss carpet itself doesn't do anything. However, using bonemeal on a moss block has a 25% chance of generating moss carpets around the block.
Here's a breakdown:
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Bonemealing Moss Blocks: Applying bonemeal to a moss block has a chance to spread moss to adjacent blocks. This spreading can result in the generation of moss carpet on suitable surfaces.
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Mangrove Propagules and Moss Carpet: Growing mangrove propagules into mangrove trees can also, in certain circumstances, generate moss carpets nearby. This isn't a direct application of bonemeal to create moss carpets, but it's a related way to obtain them.
In summary, you cannot directly bonemeal moss carpet to make it do anything. The indirect method involves bonemealing a moss block, which can then generate moss carpet.