My compared image, taken with Iphone 12pro, real life view.
TV: LG B6 OLED (2016 4k model)
Lensflare is visible as its daylight in the room and close to a window.
Its from the start of Indiana Jones UHD, uncompressed video where only the DV is converted from Profile 7 to Profile 8 in order to work on Apple TV.
HDR10:
https://ibb.co/cx3Lw2C
DV:
https://ibb.co/fSVCZpx
HDR10:
https://ibb.co/GtjWr77
DV:
https://ibb.co/s9VLh1G
I see much better control of britgtness on the DV on both image. Its clear how Static (HDR10) vs. Dynamic (DV) data can adapt to a single image.
I dont see what you talked about on brightness, might be the way Sony uses the DV data.