Problem with reporting this indicator is that DLSS works on a per-process basis.
So reporting the actual state requires determining the game's PID first. Asking the user to provide this is a no go. It could be possible similar to how PresentMon constantly monitors all processes and selects the one that has the highest GPU load, but it's not absolutely reliable...
Anyway, we'll look at this and see if it's possible to come up with some useful implementation...