pop-os
Built in Nerd Font fallback
Wezterm have builtin fallback to Nerd Fonts, which is quite convenient since I don't have to bother installing a nerd font version separately. And a lot of things depend on nerd fonts, so I think it is something that might be worth to consider to replicate for cosmic-term.
We may have a built-in font, but it would likely be something we select for COSMIC (Fira Mono).
Well, the nerd font is only for extra symbols not present in regular fonts. To be used in Vim status line and such. Typical symbols are Git Branch, Tux aso. It is to be combined with a real font, like Fira Code or JetBrains Mono. So it is orthogonal to the default font.