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. The word that U+1D31F forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The Taixuanjing is a divination guide composed by the Confucian writer Yang Xiong (53 BCE β 18 CE) in the decade prior to the fall of the Western Han dynasty. The first draft of this work was completed in 2 BCE; during the Jin dynasty, an otherwise unknown person named Fan Wang (θζ) salvaged the text and wrote a commentary on it, from which our text survives today.
Representations
System
Representation (click value to copy)
NΒΊ
119583
UTF-8
F0 9D 8C 9F
UTF-16
D8 34 DF 1F
UTF-32
00 01 D3 1F
URL-Quoted
%F0%9D%8C%9F
HTML hex reference
𝌟
Wrong windows-1252 Mojibake
Γ°ΒΕΕΈ
Encoding: GB18030 (hex bytes)
94 32 F1 37
RFC 5137
\u'1D31F'
Bash and Zsh inside echo -e
\U0001D31F
C and C++
\U0001D31F
C#
\U0001D31F
CSS
\01D31F
Excel
=UNICHAR(119583)
Go
\U0001D31F
JavaScript
\uD834\uDF1F
Modern JavaScript since ES6
\u{1d31f}
JSON
\uD834\uDF1F
Java
\uD834\uDF1F
Lua
\u{1D31F}
Matlab
char(119583)
Perl
"\x{1D31F}"
PHP
\u{1d31f}
PostgreSQL
U&'\+01D31F'
PowerShell
`u{1D31F}
Python
\U0001D31F
Ruby
\u{1d31f}
Rust
\u{1d31f}
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