Code point
U+21FB
Glyph appearance depends on your fonts.
U+21FB
SmU+21FB RIGHTWARDS 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+21FB
8699
⇻
⇻
E2 87 BB
21FB
000021FB
%E2%87%BB
\u21FB
\u21FB
\u21FB
\21FB