Code point
U+219E
Glyph appearance depends on your fonts.
U+219E
SoU+219E LEFTWARDS TWO HEADED ARROW is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Arrows block.
Choose the representation you need, then copy its value.
U+219E
8606
↞
↞
↞
E2 86 9E
219E
0000219E
%E2%86%9E
\u219E
\u219E
\u219E
\219E