Does the SDR brightness still affect HDR brightness in Plasma6.4?

With the HDR calibration tool in Plasma6.4, I can calibrate the HDR peak brightness and SDR brightness no. On Plasma6.3, the HDR brightness is also affected by the SDR brightness. Does it still happen on Plasma6.4?

I really want to see how exact the brightness of HDR video as it is shown in the stats of MPV player.