TL;DR setup Fish Shell MacOS

Here is TL;DR (too long; didn't read) summary of how to set Fish Shell on your MacOS to get that result:

Here are the commands that I used:

 bash
$ brew install fish
$ curl https://raw.githubusercontent.com/oh-my-fish/oh-my-fish/master/bin/install | fish
$ omf install bobthefish
$ set -g theme_nerd_fonts yes
$ brew tap homebrew/cask-fonts
$ brew install font-hack-nerd-font --cask

The next step will "fix" the font now being properly displayed:

Open your term2 profile:

Edit the font used:

Done.

Troubleshoot 1

I had an issue where bobthefish theme wouldn't work out, for that I followed the following steps:

 bash
functions fish_promp

And then delete the file it pointed out.

Remove omf and fish installation

I initially messed up with my installation, the following command enables me to clean up fish/omf to start from the beginning:

 bash
$ omf remove bobthefish
$ omf destroy
$ brew uninstall fish
$ rm -rf opt/homebrew/etc/fish