I put together a little example demonstrating a colourful way to present and work with emoji in PyScript:
https://about.nmstoker.com/emoji.html
The source is in the page for all to see, but in a nutshell it’s using the emoji package to turn text with the spelt out emoji names (eg :cold_face:into 
) into the actual emoji characters and then the web page itself has included an emoji font, Noto Color Emoji, with the font-family set as follows:
font-family: 'Noto Color Emoji', sans-serif;
which preferentially uses the emoji font for emoji characters but falls back to sans-serif for everything else. As a result the emoji should show up in colour (without this step, some browsers end up displaying a monochrome emoji icon otherwise).