Emoji in dash python

Could you show an example of how to do this in practice? I’m trying to put an emoji on a html.Button, but I cannot figure out how. The emoji in question is this: https://emojiguide.org/backhand-index-pointing-down

I’ve tried to use the HTML entity:
html.Button('👇')

…but it will display the raw string on the button. I am able to put other special characters on it using unicode, example:

html.Button('\u1234')

However, trying
html.Button('\u1f447')
…will not work - it will display:

\u1f44+ the number 7.

What am I doing wrong…? Some pointers would be much appreciated…

(I’m using Python3)