If you install systemdgenie - you will find it unnder the tab: User Units.
Maybe you have to select “Show inactive” and or “Show unloaded”.
Normally, the Gnome keyring is opened if you use “gdm” or “lightdm” for login.
But it is not opened for other login device managers.
Maybe the pam configuration can be tweaked.
==> XFCE 4.16 gnome-keyring ssh-agent autostart / Desktop / Xfce Forums