Code point
U+23EF
Glyph appearance depends on your fonts.
U+23EF
SoU+23EF BLACK RIGHT-POINTING TRIANGLE WITH DOUBLE VERTICAL BAR is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Technical block.
Choose the representation you need, then copy its value.
U+23EF
9199
⏯
⏯
E2 8F AF
23EF
000023EF
%E2%8F%AF
\u23EF
\u23EF
\u23EF
\23EF