Here you can buy a cheap ESP32 but with some good features that are worth having a detailed look: https://eckstein-shop.de/HIMALAYAMatrix-CoreESP32EntwicklerboardmitESP32-BitWiFi2BBluetoothIoTDEVBoard
So I have ordered one and realised, that board is not listed in the esp32 boards in Arduino. Same for Platformio in VSCode. So I have tried to use the generic ESP32 board, which worked fine for a simple test as you can see here in the video.