I don't quite understand what you mean, is it that ESP32 uses BLE to communicate with the mobile APP? If yes, this will involve communication protocol issues
@yakuzja There are two ways to get started quickly
Use the Arduino IDE and install the ESP32 support package.
Use the VSCODE PIO plug-in, this plug-in can automatically configure the environment for you, the compilation speed is relatively fast, and it also supports Arduino functions and libraries