Yep - messed around with settings more than I've actually played.
1440p30 is achievable with 'near ultra settings' -- although it might dip to the 20s when there is a lot going on. Not tested, still havent seen the city on foot yet. (Stopped playing where you first reach Vs apartment.)
Settings:
VSync: 60
Max FPS: On
set to: 60
Window mode: Fullscreen
Resolution: 2560x1440
FOV: 80
Filmgrain: On (helps actually quite a bit for the image to look more natural. Imho only turn off, when you are using DLSS (which would add too much blur if Filmgrain would be left on))
Chromatic Aberration: On
Depth of field: On
Glareeffects: On
Motionblur: Low (good setting for OLEDs with motion setting clear)
Contactshadows: On (has quite a big impact, but improves facial shadows, so you'd want it -- see other shadow settings as well, imho you can introduce 'too many shadows' making the game look a little worse (subjective) using other shadow settings)
Better Facelightinggeometry: On (untested, I always left it on)
Anisotropic Filtering: 8x (16x without many of the other settings maxed out makes the game look 'too slick' definitely check out 8x at least once).
Locale Shadow Meshquality: Medium (high is a performance hog and imho almost looks worse...)
Locale Shadow Quality: High (mashed best with Contactshadows On. If you use Contactshedows off, set to medium for a more congruent image (imho)).
Cascading shadows - reach: High (adds to the games immersion, scene lighting gets much better)
Cascading shadows - resolution: medium (High introduces much more shadows at close distance, sometimes making the game feel 'too dark', somewhat a performance hog.)
Distance Shadows resolution: High (didnt mess too much with it - lower setting probably would lower scene immersion)
Volumetric Fog Resolution: High (if its in the scene it might hog performance, but it makes particle effects look much nicer. Ultra almost looks too slick - leave on High.)
Volumetric Cloudquality: Ultra (But I havent tested this one. Probably tanks performance at day.

Please change as needed.

)
Maximum Dynamic Decals: High (Ultra changes the lighting of the game significantly, and also has a tendency to make it look too slick, also Ultra is a performance hog. Leave this on high, imho)
Quality of screen space reflections: Ultra (Another increases the immersion of the environment setting - if you can, leave it at Ultra)
Volumetric dispersion: High (makes light on human skin look more natural (high already is the highest setting), always left it at high for obvious reasons)
Ambient occlusion: Medium (leave it at medium imho, high makes the lighting look too artefical (everything 'too glossy'), also High is a performance hog)
Colorpresicision: High (already the highest setting: You probably wont notice it on medium unless you do a direct comparison, but High just looks better (larger color palette).
Mirrorquality: High or Medium (both tank the games performance, so why not set it to high..

Single digit fps confirmed..

should only matter - when you are looking into a mirror)
Level of detail : High (Already the highest setting)
That should net you 20-35 fps on a 1660p
First settings to turn down if you want more performance would be
Chromatic Aberration: Off
Contactshadows: Off (NPC: faces will be lit differently though

)
Locale Shadow Quality: Medium
And of course render resolution to 1080p (which nets you close to 1080p60 performance (on a 1660Ti), but not quite). You also have the option to dynamically lower the render resolution to net a desired framerate. Set that to 57, and play with min resolution, until you reach a desired effect. This should mostly be used to 'top off' framerate (near 57), not to double it from 30 to 60.

Because the later one will need a resolution reduction by -35(+)% (using all settings mentioned above with 1440p resolution) which makes the game look horrible.
DLSS on this game probably is a blessing.

2060 users should be able to use it with the above settings to get a much higher framerate targeting 'fake 1440p'.
Still - that mix of settings looks pretty beautiful - and is borderline playable on a 1660Ti.

--
If you are only interested in playing in 1080p60 - "High" settings should get you there. You can also top off some of the settings as mentioned above to see when the framerate drops too much for your liking.
edit: CPU was a 3700x (8 cores 16 threads), with the TDP limit lowered so it maxes out at 8 cores 3.6GHz full load but individual core load 4.3Ghz (just so it produces less heat (have it in a small form factor case (tuned for silence)). With game loads the cores would probably run at around 4Ghz. (Game probably isnt taxing all cores at once, but I havent confirmed that yet).