For a minimal graphic up, it's possible even with the ps4,
with the directx12 implementation.

On the other hand a major graphic up, it won't come before 7.0 that's for sure,

or else the ps4 version will stay on dx11 with non-updated assets, and special assets for pc and ps5 but it's not their style to make that kind of change and it would be disloyal for ps4 players.