I bought several of these V2.1 ESP32 boards to use as prototype hardware. It works very well under both Arduino and Mongoose and is easily flashed, and it resets and starts after it is flashed. Unfortunately, applying power to the 12VDC vias provided does not cause the board to start, even from a bench supply with plenty of current available. Applying power using the USB-C port from a computer also fails, although in both cases the power LED lights. If I apply power using the USB-C port from a 2.1A wall transformer it will boot and run.
So, there seems to be a power inrush problem with the design. No schematic is provided so I can't diagnose it, and a note to the seller has gone unanswered. If I could get this board to boot I would love it. As it is, I can't make much use of it.
UPDATE: I have tried everything to make this board boot reliably. Thinking its a current inrush issue, I added a caps the Vin, u to 1000uF, no luck. I confirmed that pin IO0 is being pulled high and pin IO12 is kept low. I have tried Arduino and Mongoose. An incredible amount of time has been spent on this issue with no help from the designer. Accordingly I'm lowering the rating.