If you install systemdgenie - you will find it unnder the tab: User Units.
Maybe you have to select “Show inactive” and or “Show unloaded”.
XFCE:
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