OK, I was not able to do so. I describe the steps:
- Being in Bootloader mode, just after flashing TWRP
-
adb reboot recovery
is not working (no devices/emulators found) – I understand that the phone is not prepared to receiveadb
command - Volume Down + Power (nothing would happen holding them down for 20 so seconds)
-
bootloader reboot
sends the phone in reboot. (still holding buttons) - LG logo appears
- release the Power button for a second (still holding Volume Down)
- push the Power button again
- “Factory data reset” appears [No(Exit)/Yes] (been here and done that, Android would be restored)
I did not get any other Recovery menu (with Backup, Wipe,…)