OP - sorry for not getting back to this thread sooner. The results of your PSU power readings generally confirm a low power draw, the CPU is also using some power in Furmark (my screenshot shows 36w, 9900K), you can read it in HWiNFO. Some of the FTW3's definitely under report though from what I've seen.
It's too bad because your chip and memory seem to be great overclockers, they can be much worse. I was able to push my 3080 up to 2,265mhz and pass Timespy - outside in the middle of the night in the middle of the winter, locked at 1.1V, but normally gaming it was rarely stable above 2,100mhz and +600 mem.