The biggest Mac charger is 96 W, so 75 W for CPU+GPU may be too high for sustained use. MBP 16" is also very noisy at full power, which people take as a sign of low quality. Apple will probably want to reduce the power usage significantly, so 50-60 W seems more likely for the highest-spec MBP chip.Only 30W? The AMD 5500M has a TDP of 85W and Intel around 45W?
So Apple could maybe push for a 75W M1 chip perhaps for the 16” model.
And it would still last absurdly long because it will have 4 (or more) efficiency cores.