FW13 AMD 7840U user here.
I had this one very briefly, and I cannot say whether all the features worked, but I used one 2K DP monitor and the USB ports and it seemed to work very well with the USB4. I am an Arch Linux user, though - it may be the newer kernel where things are fixed, so I would try Fedora 39 or Ubuntu 22.04 if I were you!
Now I have Dell WD22TB4, and the only thing that does not work at all is the power button on the dock, but I have a 2K DP display and a lot of USB devices connected, and the Ethernet port too, with almost zero issues (I have to reattach the TB4 cable occasionally to Framework after waking from sleep for external display to work). Firmware update also works flawlessly. I cannot test Thunderbolt devices as I really have none right now, however the dock itself identifies as a Thunderbolt for me in boltctl. Also I’ve never had any issues with resuming from sleep (have not tried hibernation though).