Cannot SSH into Home Assistant OS Host

Hello everybody, something is taking up space on my Raspberry Pi 4 on which I installed Home Assistant OS.
I want to SSH into the host OS and check what’s going on.
This is the config of the SSH addon

I created a brand new SSH keypair and an authorized_keys (ANSI and linux end line) on a usb stick formatted in Exfat (only option on Windows 10)(using this guide Debugging the Home Assistant Operating System | Home Assistant Developer Docs (home-assistant.io)). I plugged the USB key on my RPi and run “Import from Usb” from the supervisor.

When I SSH into the RPi using port 22 and username root I get inside, but the docker command isn’t recognized, so I think this is not the host OS.

Please help me.