I have changed the icon theme in the XFCE Settings Manager (Appearance section), but the new theme is not propagated to the applications. I have closed by login session and reopened it, and even boot cycled the entire system, but no change occurs. I believe that at least some font selections are also not propagated, as XFCE Terminal and Xed are configured to use the the system font, but it is different from the one that appears in their windows.
The theme settings clearly are persisted, just not applied.
How might I determine the reason?
I have recently provisioned the system, and installed XFCE4 as the only desktop manager. I am opening the Windows through an SSH connection, with X forwarding, initiated from a host running Cinnamon DE over Linux Mint 21.
It has worked in the past that at least icon themes would be determined by the settings on the remote host, not the local host serving the X environment, though now is my first experience with the Arch family.
On the local deskop, the icons also are not following the settings I configured.
It is also curious that on the local display of the system, the window decorations follow a blend of the Mint theme that I installed and selected versus a native theme.