@WhiteNoise: Sorry, just wanted to be sure you understand me correctly. I’m not talking about dragging/dropping folders into Obsidian File explorer, so I think the new Subject of this thread is wrong.
The problem is that if you put a new folder in Obsidian vault using system Finder, the Obsidian File explorer is not updated until you restart it. This does not happens with plain files.
Sorry for being not clear enough!