The "curly loop" originates from Japan. Looks like an astrological symbol and is also used as a secret code. Shhh, do not tell anyone!
The curly loop emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols
category. Because the curly loop emoji has been around for quite some time, it should display correctly in the majority of operating systems.