This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+225E forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
The equals sign (British English) or equal sign (American English), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. In an equation, it is placed between two expressions that have the same value, or for which one studies the conditions under which they have the same value.
In Unicode and ASCII, it has the code point U+003D. It was invented in 1557 by Robert Recorde.
Representations
System
Representation (click value to copy)
Nº
8798
UTF-8
E2 89 9E
UTF-16
22 5E
UTF-32
00 00 22 5E
URL-Quoted
%E2%89%9E
HTML hex reference
≞
Wrong windows-1252 Mojibake
≞
Encoding: GB18030 (hex bytes)
81 36 D8 35
RFC 5137
\u'225E'
Bash and Zsh inside echo -e
\u225E
C and C++
\u225E
C#
\u225E
CSS
\00225E
Excel
=UNICHAR(8798)
Go
\u225E
JavaScript
\u225E
Modern JavaScript since ES6
\u{225e}
JSON
\u225E
Java
\u225E
Lua
\u{225E}
Matlab
char(8798)
Perl
"\x{225E}"
PHP
\u{225e}
PostgreSQL
U&'\225E'
PowerShell
`u{225E}
Python
\u225E
Ruby
\u{225e}
Rust
\u{225e}
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