Hello @Zontex
Understood. Thank you for checking.
Maybe it could still be wired to a GPIO, but via a solder bridge, so it could be used optionally?
Anyways, I've soldered a wire from AXP IRQ to ESP32 GPIO35. I can detect now when USB (aka ACIN) has been connected or disconnected while ESP32 is in light sleep and use that to wake up.
Cheers
Felix