Did you try escaping the \? i.e. \\U1D4B7 since most regex implementations use the backslash as a special character. Though I'm not sure if calibre allows use of that format for a Unicode character.
Alternatively, just copy/paste the bscr ( �� ) into the search box. Interesting while I can see the character while entering the message, it does not show when I post the message and if I quote the OP's message it still doesn't show.
Quote:
Originally Posted by Azraelo
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