$ unichars -g '/[[:punct:]]/ != /\p{punct}/'
U+0024 ‭ $  GC=Sc DOLLAR SIGN
U+002B ‭ +  GC=Sm PLUS SIGN
U+003C &#8237; <  GC=Sm LESS-THAN SIGN
U+003D &#8237; =  GC=Sm EQUALS SIGN
U+003E &#8237; >  GC=Sm GREATER-THAN SIGN
U+005E &#8237; ^  GC=Sk CIRCUMFLEX ACCENT
U+0060 &#8237; `  GC=Sk GRAVE ACCENT
U+007C &#8237; |  GC=Sm VERTICAL LINE
U+007E &#8237; ~  GC=Sm TILDE