Eli Zaretskii <eliz@gnu.org> writes:

>> +@item
>> +@findex isearch-emoji-by-name
>> +@kindex C-x 8 e RET @r{(Incremental Search)}
>> +Type @kbd{C-x 8 e @key{RET}} (@code{isearch-emoji-by-name}), followed
>> +by the name of an Emoji.  This adds the specified Emoji into the
>> +search string.
>
> This should explain what kind of "emoji names" the feature accepts.
> It is entirely unclear from the text.
>
>> +*** New command 'isearch-emoji-by-name'.
>> +It is bound to 'C-x 8 e RET' during an incremental search and it
>> +inserts an Emoji character into the search string.
>
> Likewise here.  The NEWS entry doesn't even mention that Emoji are
> specified by their names.
>
>> +(defun isearch-emoji-by-name (&optional count)
>> +  "Read an Emoji and add it to the search string.
>
>   "Read and Emoji name and add it to the search string."
>
> Likewise here, the doc string should clarify what kind of names are
> acceptable.  I would also mention that completion is provided while
> typing the name.

If I'm not mistaken, what the new emoji-search command accepts is
technically the CLDR short name of an Emoji.  As the term is a bit
obscure, I've added a few examples to the documentation.  I've also
updated the prompt in emoji-search, so now it explains in parenthesis
what you can type, in a similar way as classic 'C-x 8 RET'.

That is, 'C-x 8 RET' prompts with:

  Insert character (Unicode name or hex):

And now 'C-x 8 e s' prompts with:

  Insert emoji (CLDR short name):

Attached a new patch, I'm not sure if that's what you asked for.