Code point
U+21DF
Glyph appearance depends on your fonts.
U+21DF
SoU+21DF DOWNWARDS ARROW WITH DOUBLE STROKE 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+21DF
8671
⇟
⇟
E2 87 9F
21DF
000021DF
%E2%87%9F
\u21DF
\u21DF
\u21DF
\21DF