Because no matter what TX power level setting I enter, the power level stays the same as the default.
Definitely not shielded.
Using the ESP32-WROOM-32D and NRF BLE App to check the reception.

No matter what I do, I have been through every discussion on this forum, I can not increase the TX power level on my ESP32-Wroom 32D. I do not need to connect, just transmit advertising data, but the maximum distance I get is about 4m! Can someone please provide more information and maybe a working ...