It’s been noticed that the latest FSR Upscaling SDK .dll’s were added to the game files in the Battle.Net version. This is enabling users to use FSR3 or upgrade to FSR4 if using RDNA4 hardware
However, the required .dll’s are missing from the Steam version. A few users on the fourms and Reddit have manually added the files to the Steam folder and it works as expected, but I’d rather not risk that and would prefer the Steam version achieves parity with Battle.Net 
Thanks!