I dont know abut ram but its very unlikely that CPU will be a bottelneck in most games . Its not a high end pc targeting 120 frames per second where cpu matters more. There of course will be exceptions ( space marine 2 apparently might have lower framerates on ps5 due to cpu so its unlikely that ps5 pro will fix this but who knows ).
Yes they cant. Dlss is something they developed and every single one of their GPU has cuda cores ( not only for ai , they are just generaly usefull ). Pepole are expecting them to work with dlss. Its kinda stating the obvius