Recently, tired of the huge accidental complexity of Gnome and KDE, I decided to switch back to Window Maker (again). Being a big terminal user, when I was setting up the terminal, I noticed that emojis were not being displayed correctly by Starship prompt.
First thing, I installed Nerd Fonts from their website nerdfonts.com. Guess what - no emojis.
Then, digging a bit more, I found that some emojis were being displayed properly, but curiously the ones being displayed by Starship prompt were all missing.
To my luck, there is a deb package that contains all the Emojis and can be used as a fallback for missing emojis:
sudo apt-get install fonts-noto-color-emoji
After installing it and restarting the terminal, I got all emojis being properly rendered.
Finally an easy one.