Code point
U+2365
Glyph appearance depends on your fonts.
U+2365
SoU+2365 APL FUNCTIONAL SYMBOL CIRCLE DIAERESIS 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+2365
9061
⍥
⍥
E2 8D A5
2365
00002365
%E2%8D%A5
\u2365
\u2365
\u2365
\2365