@ddrillic thanks for the reply.
I am unable to attach the screenshot as i dont have enough Karma points.
In the log events, I can already see them as Emojis (smilies) and they are not stopped or converted as there is no transformation rule.
Hence, I want to track / alert on it.
I have a similar problem, and I ended up writing a custom command which makes use of the Python emoji module to detect emoji in the string.
And here are some info about custom commands, in case you're not familiar with it.