Not exactly. It's true that they are (mostly) not found in the same block as other (alphabetic, numeric, punctuation etc.) characters. But there is no single

Not exactly. It's true that they are (mostly) not found in the same block as other (alphabetic, numeric, punctuation etc.) characters. But there is no single emoji block, which makes it hard to write regular expressions to search for emoji, unless you are using a regex language that allows reference to Unicode properties (like Perl, or the Python3 regex library, not to be confused with the more commonly used re library).