It's fair to say that in pure rasterization performance the PS5 might be around half the performance of the 3090.
I think in raw theoretical power 3090 is more then twice as capable. 6900xt sits abit below a 3090 and thats at close to 25TF. A OC 6900XT sits at 3 times the ps5 in normal rendering. Intresting to see tests on that gpu for this game.