I'm still not seeing how you're drawing the equivalence. The 2060 is running at max PC settings which is most closely equated to PS5's quality mode (there is no exact settings match). In quality mode the PS5 runs almost consistently significantly below 4K and in those scenes that are most taxing can drop as low as 1440p. You're comparing this to a DLSS output of
fixed 4K?
In fact if you want a direct comparison you need look no further than the same Nioh2 video you posted above, but look to the 1440p DLSS section. This represents equivalence with the lowest resolution the PS5 drops to. i.e. those scenes where it gets so close to 60fps that it has to drop all the way back to 1440p to stay above. If the 2060 using DLSS where clearly slower then we should see it dropping below 60fps, or at least getting very close to it in this mode shouldn't we? And yet what we see in the video and what Alex explains is that it's always comfortably above 60fps. This is far from conclusive, but based on the available evidence it's reasonable to assume that the 2060 using DLSS quality mode is performing at least as well as the PS5. And naturally a 2060S would perform noticeably better (to the tune of around 12% according to TPU).
It's also worth noting that the performance uplift from DLSS isn't actually that huge in this scenario. Only 28% according to Alex, whereas more optimal scenario's can see performance uplifts over 100%.