Use Noto Emoji on Linux.

fonts.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">

<fontconfig>
    <!-- prepend color emoji to all -->
    <match>
        <edit name="family" mode="prepend"><string>Noto Color Emoji</string></edit>
    </match>
    <!-- prepend black and white emoji if monospace font is used -->
    <match>
        <family>monospace</family>
        <edit name="family" mode="prepend"><string>Noto Emoji</string></edit>
    </match>
    <!-- apple font name alias -->
    <alias>
        <family>Apple Color Emoji</family>
        <prefer><family>Noto Color Emoji</family></prefer>
    </alias>
    <!-- gedit uses color emoji. This does not seem to be working 😩 -->
    <match>
        <test name="prgname"><string>gedit</string></test>
        <edit name="family" mode="prepend"><string>Noto Emoji</string></edit>
    </match>
</fontconfig>