Code point
U+228A
Glyph appearance depends on your fonts.
U+228A
SmU+228A SUBSET OF WITH NOT EQUAL TO is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Mathematical Operators block.
Choose the representation you need, then copy its value.
U+228A
8842
⊊
⊊
⊊
E2 8A 8A
228A
0000228A
%E2%8A%8A
\u228A
\u228A
\u228A
\228A