BetaFPV M03 VTX works with TBS SmartAudio protocol. The screenshot was just for illustrational purpose on how to load the VTX table. It indeed worked. All the VTX devices were tested before posting the VTX table. Check your wiring and setup. Refer to this guide Smartaudio VTX control and how to set it up.
I will update the article with more details on the VTX setup.