With “STM32CubeProgrammer”, you can flush.
**** For reference ****
When compiled with ArduinoIDE2, the hex file is created in the folder below. Select and write the file with STA32CubeProgrammer.
In case of Windows
C:\Users\username\AppData\Local\Temp\arduino\sketches\32 digit HEX string\sketchname.ino.hex
In case of Linux
/tmp/arduino/sketches/32 digit HEX string/sketchname.ino.hex