5-6 hours? In 2025? That's... really bad. My 5 year old Macbook Pro lowest-spec M1 gets at least 10-12 hours of work on a charge and lasts for weeks in sleep mode.
My idle power consumption at 0% display brightness is around 7.5W, but I've seen people get to as low as 6.5W. Not great, not terrible. With the display at 50% it jumps to the teens(13-17W).
Meanwhile the display in the MBP peaks at 6.2W:
https://andytran93.com/2021/12/05/power-consumption-implicat...
I guess herein lies their secret sauce - with the rest of the device idling at ~5W total power consumption in this state doesn't go beyond 11W.