Hello everyone,
I've been using the RPi version of LibreElec for a few days now. So far, I haven't really encountered any problems (at least, not more than with the PC version).
All I need to do now is configure the box (Argon ONE), but I've seen that the script can be used (via SSH?).
So I'm closing the subject, thanks to all those who have contributed, I'd never have found it.
EDIT 2003/10/01 : RE: [RPi4B] Argon One Case Shutdown