When using the monospaced nerd fonts, the whitespace between icons and names is very wide. An option to reduce this space would be nice.

Is it like that for all the nerd-patched fonts?
FWIW I use the nerd symbols, but no patching, and I don't get gaps like that:

I have font fallbacks configured via fontconfig/fonts.conf, with a build of Iosevka falling back to nerd's Symbols.
I don't know why I never see this kind of configuration recommended, but it works great for me, and makes more sense to me than splicing fonts together.
@AndydeCleyre those are double-width icons. See the wiki for the difference between those and monospaced versions.
Your suggestion of using the fallback mechanism is pretty interesting!
Same issue using jetbrains nerd font
We should have a fix for this in https://github.com/Peltoche/lsd/pull/469 which should land pretty soon. Closing this for now, keeping #363 as the tracking issue for this.
Thanks, @meain and @OrangeFran!