My SAMSUNG QE43LS03 The Frame 3.0 - TV (43 ", UHD 4K, QLED) works with the stand
Samsung VG-SESB11K/XC.
Unfortunately, I have mounted the Frame back on the wall and can no longer use the stand. Can also put it back on sale.

My Samsung is a bit older, UE55C7700WSXZG, and you are right, it is NOT compatible. I was also frustrated at first because I assumed that Samsung would pay attention to such an important detail, but they do not. Well, the stand is very nice and it fits well in my loft environment. That's why the TV now hangs on two screws instead of four and is just moved very carefully :-)