For a long time, I’ve just put on DejaVu fonts and been done with it. Generally good enough Unicode coverage for me. But I know it’s been years since DejaVu’s been updated, and I wonder what’s very common today.
[As for the terminal, I’m guessing it’s usually still the standard fixed Unicode fonts?]
Can't speak to how common they are, but I do like the Nerd Fonts, and particularly MesloLGS NF 10pt for my monospaced font. Very handy for Zsh Powerline10k and neovim.