Code point
U+2E57
Glyph appearance depends on your fonts.
U+2E57
PsU+2E57 LEFT SQUARE BRACKET WITH DOUBLE STROKE is a Unicode 16.0.0 character in the Open Punctuation category. It belongs to the Supplemental Punctuation block.
Choose the representation you need, then copy its value.
U+2E57
11863
⹗
⹗
E2 B9 97
2E57
00002E57
%E2%B9%97
\u2E57
\u2E57
\u2E57
\2E57