Code point
U+3378
Glyph appearance depends on your fonts.
U+3378
So<square> 0064 006D 00B2U+3378 SQUARE DM SQUARED is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+3378
13176
㍸
㍸
E3 8D B8
3378
00003378
%E3%8D%B8
\u3378
\u3378
\u3378
\3378