I doubt it can power on the pi from remote, as there are reports of it being connected to GPIO 23. Perhaps if the pi is just in standby....
GPIO 23 wouldn't work, as that's SCLK according to the pinout displayed on the case:
Unless you mean the pin labeled #23, which would then be GPIO 16.
I meant GPIO 23 which is on pin 16, just as I wrote.
I haven't tried it, so I have no direct knowledge. That info comes from here.
Argon One case with IR receiver and LIRC - Raspberry Pi Forums
BTW, why are my posts being moderated?