One of the things I’ve found unusual with Antergos, and now EndeavourOS in Xfce is the really large Authentication Agent windows. Since there might be some new people here that didn’t see my original posting in Antergos about this, @joekamprad gave me the answer to fix this.
Install “xfce-polkit-git** , which provides /usr/lib/xfce-polkit/xfce-polkit”. When you install it, it will tell you it will conflict with the gnome-polkit. I tell yay to replace the gnome for xfce, and when I restart I have normal Authentication Agents again. So far, I haven’t had any problems with either Antergos or EndeavourOS.
HTH anyone who doesn’t like the half screen width Xfce authentication window.