If anyone is interested in lowering the white point of the MacBook Pro M2 TB with the good screen, I can share a D55 screen profile generated with a Calibrite Display SL colorimeter. These screens are very accurate after being calibrated to 5500k (Avg DeltaE of 0.5). This is likely to be much more accurate than BetterDisplay tweaks.
(I've always calibrated all my displays to a warmer white point than the native D65; even apart from the blue light and eye strain angles, D65 has never really made sense to me for reading.)