I think they are very loosely repinterpreting Standby as “behavior of a smartphone when the screen is off but is ready to use on short notice” - it’s not what Standby on a PC ever was, and the options in the UI actually all name it “Sleep” which is definitely wrong.
Basically you need to check with “powercfg -a” to see if Sleep actually sleeps or does not - as a guideline, anything that says S0 is a full active state.
I would be less infuriated if they wouldn’t have also forced plattform developers to remove support for S3 with the tried and true “do as we say or you’ll not get Windows Logo certification”.