Access utf values and echo from indexes on rc?

Before I write any code over the issue, does anyone have a grep, sed, or
split application which matches by utf character values like \U2424 instead
of whatever built-in token like \n ?

Or another basic question I cannot get the manuals to answer yet, how to
'echo \U2424' value?

Just seems like this would have been done already, so asking,
tyvm




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