This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F9C4 offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “garlic” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: flavoring.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 🧄︎ See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
Garlic (Allium sativum) is a species of bulbous flowering plant in the genus Allium. Its close relatives include the onion, shallot, leek, chive, Welsh onion, and Chinese onion. It is native to Central Asia, South Asia and northeastern Iran. It has long been used as a seasoning and culinary ingredient worldwide, with a history of several thousand years of human consumption and use, including also use as a traditional medicine. It was known to ancient Egyptians and other ancient cultures for which its consumption has had a significant culinary cultural impact, especially across the Mediterranean region and across parts of Asia. It is produced globally but the largest producer is China which produced 73% of the world's supply of garlic in 2021. There are two subspecies and hundreds of varieties of garlic.