fc-cache --really-force
fc-list | grep -i "emoji"
mkdir ~/.config/fontconfig/

echo '<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>Cousine</family> <!-- Your preferred monospace font -->
      <family>Noto Color Emoji</family> <!-- Your preferred emoji font -->
     </prefer>
  </alias>
</fontconfig>' > ~/.config/fontconfig/fonts.conf

fc-cache --really-force

# in your alacritty.yml config 
font:
  normal:
    family: monospace
    style: Regular
  bold:
    family: monospace
    style: Bold
  italic:
    family: monospace
    style: Italic
  size: 18
  offset:
    x: 0
    y: 0
  glyph_offset:
    x: 0
    y: 0