If NVMeFix reports that APST is turned on, then APST is almost certainly on.Hi,
This is my power draw, while some basic usage - browsing. Basically it does not get lower then 119 mA. It look like NvmeFix does not work also for me.
I've got MBPro 15 Mid 2015 and Sabrent Rocket 512GB.
I suspect iStat is reporting ISDC, PSDC SMC keys, but I don't know what they exactly indicate and how they are physically measured. Rather than looking at this graph, you should compare battery life with and without the kext.
FWIW on Windows StorNVMe reports APST enable success, and I am getting approximately the same ISDC and PSDC values as on Mac. However, for my typical use case I get 30-60 min longer battery life with APST on.