If someone finds this thread with an ESP32-S3, you also need to gall gpio_reset() on pins 39, 40, 41, 42.
Even though the manual says that if USB JTAG is enabled (which it is by default), then these pins are working.
If you do not call gpio_reset() on them first, they will not react at all.

Hello, Is there any documentation regarding the current sink capability on these pins (IO40/41/42)? I made a prototype board and I am switching some SSR's through 430 Ohm resistors, and the SSR's connected to these pins do not switch. If I set the pins low, then I still have 2.9V on them. No issue o...