Code point
U+237B
Glyph appearance depends on your fonts.
U+237B
SoU+237B NOT CHECK MARK 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+237B
9083
⍻
⍻
E2 8D BB
237B
0000237B
%E2%8D%BB
\u237B
\u237B
\u237B
\237B