How do I install Home Assistant OS?

I have tried to download Home Assistant OS on more than one memory and on more than one Raspberry Pi and I can’t find a tab supervisor

Under configuration?

What I’m I missing here? You’re running Home Assistant OS 7. It’s under the host tab.

I am looking for this icon

I don’t believe that is there (by default) in the HA version you are running. It’s has been moved to Configuration, as I showed you in the screenshot.

From your own screenshot you provided.

This changes the old style I was using
thank you