They do support DLSS but you don't want to benchmark competing GPUs when one is outputting a completely inferior image.
But when one can provide a far superior image with a performance uplift, and you don't account for that in the final assessment of your review, you're not really giving an accurate conclusion as to what is the overall actual value of the product when used in real gaming situtations.
I get the logistics of video card reviews and the wrench reconstruction throws into it, it's not an easy problem to solve - I'm not suggesting a weighting system to be used in benchmarks or comparing 'equivalent' visual quality by benchmarking different reconstruction settings. But in a recent review (think it was comparing the 4060 to 7600..?) Steve mentioned DLSS in his summary, and while a positive for Nvidia, ultimately 'wasn't that much better' than FSR, or something to that effect. When of course, one of the comprehensive comparative looks at FSR vs DLSS was done by his own partner, Tim - showing that was decidedly not the case.