Homebrew: list available package versions

brew info --json postgresql | jq -r '.[].versioned_formulae[]' 

Note will not show current version and do not work on casks.

Related

• snap list --all

See also

• brew: update | upgrade | autoupdate | install | uninstall | services | list, cask | cleanup | doctor | test | link | unlink | changelog | tap | info | search | install --cask | analytics off | --prefix | --version | brew --help ]

https://stackoverflow.com/a/59569730