Code point
U+21CE
Glyph appearance depends on your fonts.
U+21CE
Sm21D4 0338U+21CE LEFT RIGHT DOUBLE ARROW WITH 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+21CE
8654
⇎
⇎
⇎
E2 87 8E
21CE
000021CE
%E2%87%8E
\u21CE
\u21CE
\u21CE
\21CE