Perhaps its development team could also increase the frame rate? (startreplay.com)
Some console games do have settings that allow you to dial down the degree of detail, which increases the frame rate, but most do not. (howtogeek.com)
The developer's official patch notes don't go into much detail about how the PS4 Pro will be supported, writing only that version 1.11 of Dark Souls 3 will see «Increased frame rate for gameplay on PlayStation 4 Pro.» (polygon.com)