Code point
U+21FA
Glyph appearance depends on your fonts.
U+21FA
SmU+21FA LEFTWARDS ARROW WITH DOUBLE VERTICAL STROKE is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Arrows block.
Choose the representation you need, then copy its value.
U+21FA
8698
⇺
⇺
E2 87 BA
21FA
000021FA
%E2%87%BA
\u21FA
\u21FA
\u21FA
\21FA