This character is a Other Letter and is mainly used in the Javanese script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+A9A0 forms an orthographic syllable in Brahmic scripts with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
ꦠ is a syllable in the Javanese script that represents the sounds /t̪ɔ/ and /t̪a/. It is transliterated to Latin as "ta", and sometimes in Indonesian orthography as "to". It has two other forms (pasangan), which are ◌꧀ꦠ and ◌꧀ꦠꦸ (if followed by 'ꦸ' and several other glyphs), but represented by a single Unicode code point, U+A9A0.
Representations
System
Representation (click value to copy)
Nº
43424
UTF-8
EA A6 A0
UTF-16
A9 A0
UTF-32
00 00 A9 A0
URL-Quoted
%EA%A6%A0
HTML hex reference
ꦠ
Wrong windows-1252 Mojibake
ê¦
Encoding: GB18030 (hex bytes)
82 37 92 37
RFC 5137
\u'A9A0'
Bash and Zsh inside echo -e
\uA9A0
C and C++
\uA9A0
C#
\uA9A0
CSS
\00A9A0
Excel
=UNICHAR(43424)
Go
\uA9A0
JavaScript
\uA9A0
Modern JavaScript since ES6
\u{a9a0}
JSON
\uA9A0
Java
\uA9A0
Lua
\u{A9A0}
Matlab
char(43424)
Perl
"\x{A9A0}"
PHP
\u{a9a0}
PostgreSQL
U&'\A9A0'
PowerShell
`u{A9A0}
Python
\uA9A0
Ruby
\u{a9a0}
Rust
\u{a9a0}
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