You mean the default XFCE wallpapers, we didn’t remove or touched those. I will look into that and come back to you later. (I’m currently in the middle of something)
Yes, XFCE wallpapers, I can’t see them anymore.
I found them in /usr/share/backgrounds/xfce, so I had to move the files from /usr/share/backgrounds/xfce to /usr/share/backgrounds, since desktop settings doesn’t show xfce map.
after the update , did you got a window and did put enter on it ?
Yes, I did.
/usr/share/backgrounds/xfce was and is the default folder for xfce wallpapers:
And you can change to use another folder on settings and let it show any folder you want

We do change only the place for EndeavourOS related backgrounds before they were under /usr/share/endeavouros now you will find them under /usr/share/endeavouros/backgrounds
this i happend in virtualbox xfce ,
i installed it and updated it also overwrite those png files by update , the greeter window came up and if you entered it, it changed the background also the folder. the background folder your looking is in the /usr/share/endeavouros/(backgrounds)
you have to hit other and go to the xfce folder. its stil in /usr/share/backgrounds/xfce
I tried that, but I have to hit other everytime, it is not saved that selection.
if you go to startup & session, is the session checked to save the session ?
No, it was not checked, I just checked it.
not needed to checked but want to know