Wait, why does EA need to update those older Battlefield games when it's a change in Windows that broke HDR compatiblity? Those games have been stable and haven't needed an update for years.
So it seems to me that Microsoft needs to take a look at some of these earlier HDR compatible games, and figure out why Windows broke the communication layer that the OS uses to tell the games it can output HDR.
I've already used the HDR calibration tool, and as I mentioned before, HDR works in some games, like Doom Eternal and Hellblade.