Except in that case, the system would be docked, negating any power issues. That said, I do believe in some videos on YT, folks have tested power usage of gaming PCs with native resolution, and DLSS upscaling. I do believe the latter uses less power, but if I recall correctly, does not save a massive amount of power. Nothing is free of course as the tensor cores would be more utilized in this case. So using DLSS even in handheld mode I think would still result in power savings compared to native resolution.
Though, some of the other smarter Famis out there can go into more details on that.
You need to find yourself a good sipping tequila if you haven’t tried already. As a Bourbon drinker primarily, I quite like the profile of a good quality tequila that you can sit on the couch, and enjoy. My wife and I still have this bottle that looks like a flower vase, though can't remember the brand specifically. It is shockingly good imo.