According to the release notes, the fix is specific to the GeForce RTX 50 series. NVIDIA doesn't go into any more detail ...

The NVIDIA GeForce RTX 5070 GPU is here, and with DLSS 4 it's a fantastic 1440p gaming performer - but is it enough to turn heads?

GeForce Game Ready Driver 572.42 has been released ... DLSS 4 support is available on Steam via the NVIDIA App's DLSS Override feature. This includes the new Multi Frame Generation technology ...