Apple ships a 30w charger with the M1 air. I can't find any zen 3 shipping with less than a 65w charger.

Mac mini uses like 25-27w at the wall. 15-25w TDP for the 5800u doesn't include RAM (it's LPDDR4 at 1.1v will use a lot more power than M1 LPDDR4x at 0.6v). 5800u also has a chipset that consumes a few watts.

5800u has some features that the M1 does not (these would likely increase M1 power usage), but still doesn't seem close in power consumption.