This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as bowl of rice.
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+1F35A offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “cooked rice” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: cooked, food, rice.
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:
Congee (, derived from Tamil கஞ்சி[kaɲdʑi]) is a form of savoury rice porridge made by boiling rice in a large amount of water until the rice softens. Depending on rice-water ratio, the thickness of congee varies from a Western oatmeal porridge to a gruel. Since the history of rice cultivation in Asia stretches back to the Baiyue-inhabited lower Yangtze circa 10000 BC, congee is unlikely to have appeared before that date. Congee is typically served with side dishes, or it can be topped with meat, fish and pickled vegetables.
Vivid experiences of eating or delivering thin congee as wartime or famine food often feature in diaries and chronicles. In some cultures, congee is eaten primarily as a breakfast food or late supper; some may also eat it as a substitute for rice at other meals. It is often considered suitable for the sick as a mild, easily digestible food.