Found the upstream bug: https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/400
> It seems the font is considered as a bitmap font now (wasn't the case in > 2.14.x) and because of no-bitmap.conf, the emoji font wouldn't load. Removing > this conf file makes the emoji font load fine. I am unsure whether to > consider this as a regression, but for now I will close this issue. After running "dpkg-reconfigure fontconfig-config" and enabling bitmap fonts the color emoji indeed work again. Greetings, Markus
