Yup, just did it, and flashing the test cli image gives a blank SD card…?
So, I used another image to make a bootable SD card, and then copied your testing.img over to the root partition. That worked
But, the best option for me is a CLI image where I can set the location, keyboard layout, time zone and WiFi country. In my case it’s not the default US for everything. Then after that is done, just run tasksel and select the desktop environment I want. Better than having 8 images, one for each desktop environment.
Anyway, I booted your XFCE testing image, and had many errors loading modules, like BT and so on. When I logged in to the desktop, I had no WiFi and no BT. BT is normally not loaded in the Debian XFCE image, so I have to add bluez and blueman afterwords. But the WiFi packages should be there (unless you used apt install xfce4 instead of tasksel). Perhaps WiFi is blocked by no WiFi language set? Or WiFi kill enabled?
Also, the useful file rsetup was not on the image, the first thing I would run when booting and setting up a new system. Adding a new user, setting the location data and then selecting a desktop. Just my way of doing it
If you upload a new Debian testing (Trixie) install cli image for the 4SE card, I’ll surely give it a try.