I think people mostly just use powerlevel10k and various themes.

I wonder if Oh my Zsh and its equivalents for other shells might be what you're really after?

https://ohmyz.sh/

You can just use Starship

Here is mine as an example. I started with oh-my-zsh, then moved to bash and just keep the basic information I need.

  # Simple prompt
  function set_bash_prompt {
    status=$?
    container=""
    if test -f /run/.containerenv; then
      container="($(cat /run/.containerenv | grep name | cut -d\" -f2)) "
    fi
    if test $status -eq 0 ; then
        # Last command succeeded, set prompt to green
        PS1="\[\e[0;32m\]"
    else
        # Last command failed, set prompt to red
        PS1="\[\e[0;31m\]"
    fi
    PS1+="$container\w \$ \[\e[0m\]"
  }

  if [ -n "$SSH_CONNECTION" ]; then
      export PS1="\u@\h: \w \$ "
  else
     #  export PS1="\e[0;32m\]\w $ \[\e[0m\]"
      PROMPT_COMMAND=set_bash_prompt
  fi
  export PROMPT_DIRTRIM=1 # number of trailing directory to retain when using \w

Note: I've used toolbox and distrobox, so the function at the top was just to add what current env I'm in. Kinda like venv.

That is basically what Oh My Zsh does for zsh: https://ohmyz.sh/ Even if you don't use zsh you can look at the source code and adapt the prompts for the shell you are using.