OK, I see... Your English is maybe even better then mine, it's not my first language as well...
Well, there are 2 basic options how 'deep' the RPi 4B's shutdown can be. It depends on bootloader configuration.
You can check your current config with: vcgencmd bootloader_config command.
When you change the default option POWER_OFF_ON_HALT=0 to POWER_OFF_ON_HALT=1, you could connect a LED in serie with resistor (about 500 - 1000 Ohm) to unused USB port. So it turns off when the RPi is completely down.
FYI some details can be found here: Raspberry Pi 4 B GPIO boot and shutdown button(s) - Raspberry Pi Stack Exchange