Dolby vision for gaming is a dud, ignore it and get the best OLED panel you can for your use case within your budget.
My sets are as follows:
Living room - Philips OLED 805 65"
Spare room hooked up to PC - LG CX 55"
The Philips is primarily for movie/TV watching with the Mrs (I also game on it, the PS5 and a gaming laptop are also connected to it) and it was between that and a Panasonic HZ1000 at the time and went for the Philips because we love the built in ambilight (honestly unless I'm going for 80 inch or above next time I don't think I'll want to do without it, in a dark room setting it's sensational) and on balance it offered the best features at the time (dolby vision, dolby atmos pass-through, android TV) . The image processing for both HDR and SDR content is incredible, its better than anything I've seen on LG panels.
The CX was actually purchased this year because I wanted to replace my old Q70r that I was using with my PC at the time. Was going to get a 48" C1 but the store I went to had 55 inch CX's for the same price at the time, saw them side by side and went for the larger CX. It's been sensational for gaming and if you're buying an OLED
only for gaming then it's hard to look past LG. Doesn't get as bright as the Philips and it's nowhere near as good in non-gaming content but I only use it for games 99% of the time so it's been perfect for that.
The only OLED sets capable of Dolby Vision gaming are LG sets as far as I know.
With that said, Dolby Vision gaming is kind of pointless right now any way. I have an LG C2 and I opt for standard HDR-10 over DV on my Series X.
Philips and Panasonic sets also have it.