BLE not working: I see signal on spectrum analyzer but can t see the device advertising

Hello, i am new to the whole NRF programming. I created my custom board with a NRF52811 SoC, without external LF crystal. I have been trying to get the device to advertise the BLE with blinky example, but i can t see it advertising with any device. I used RC for LF clock and i did flash softdevice 112 version 7.0.1. When i look for signal on spectrum analyzer i see the advertising channels where they should be and are quite strong.

Other than that my SoC works fine, i was able to program PDM microphone data sampling and writing it on the microSD card, led blinking works, just not BLE.

Does anyone have any idea what could be wrong? I put my code into the zip file.