Code point
U+23AF
Glyph appearance depends on your fonts.
U+23AF
SmU+23AF HORIZONTAL LINE EXTENSION is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Technical block.
Choose the representation you need, then copy its value.
U+23AF
9135
⎯
⎯
E2 8E AF
23AF
000023AF
%E2%8E%AF
\u23AF
\u23AF
\u23AF
\23AF