Fish shell integration for Homebrew users on Apple Silicon.
Assuming that you are using a fish shell plugin manager such as Fisher:
$ eval (/opt/homebrew/bin/brew shellenv)
$ # install fisher
$ fisher install dteoh/fish-homebrew-apple-silicon
... then start a new shell.
The initial eval is required so that the plugin manager can find fish.
Otherwise, installing this plugin will most likely fail.