It seems that a similar thread was here:
Like in Antergos also in Endeavour which is even closer to Arch, you will not find this option by default. And there is really nothing wrong with it. As mentioned, you can install pamac which essentially perform what you expect. In addition to the links listed here, most of the information about package manager in Endeavour is here:
https://wiki.archlinux.org/index.php/Pacman
but Bryan wrote it even easier with other examples.