Fedora Atomic 44 GNOME
I am leaving this here for others to find because Kensington does not support Linux for this keyboard and people must rely on the experience of others. I had the keyboard for one day with normal home use.
It is an ergonomic keyboard with soft keys, soft wrist band and a perfect size, big enough to spread your hands comfortably but without taking up half of your desktop like other ergonomic keyboards I had do.
Tri-mode keyboard, I paired it fine with bluetooth but the volume kept turning itself off when the keyboard was idle, I searched in Gemini AI and apparently it is related to:
Bluetooth autosuspend . When the keyboard enters a power-saving state, the Linux kernel often resets the entire Bluetooth controller (the btusb module).
Gemini mentioned a work around to fix this by editing /etc/bluetooth/input.conf and changing the IdleTime to zero but I decided not to test it and I connected the provided USB 2.4Ghz dongle instead, this fixed the audio problem.
Keyboard special keys, surprisingly the calculator key launches the calculator in Fedora and the search key opens up Gnome top menu, and the other three special keys, cam key, mic key and screen key don’t do anything but maybe they will work with other applications. The video player keys, tested with Gnome video Showtime and surprisingly they all work, pause, volume up/down, etc.
Verdict, everything works except bluetooth disconnecting the audio which likely can be fixed if you want to mess with Fedora configuration files. I am keeping it.