New HA Green user struggling with eWeLink and Sonoff smart plug

Hi all, first post so apologies if this is in the wrong place. I have a brand new HA Green and I have never used anything remotely similar before. I’ve watched a load of videos about setting it up, it is plugged in and working and has managed to find my Canon printer, but that is all. I have a Sonoff S60TPG smart plug which is connected to eWeLink and I have read the instructions for adding it to HA, but I fall at the first hurdle because Supervisor doesn’t appear in the left panel of my screen. Does the HA Green not support eWeLink?

Update - I have finally managed to add my smart plug to Home Assistant Green. The difficulty I had was that all of the instructions implied that the Supervisor would be visible in the left panel - it isn’t. You can find it in Settings > Devices and Services. Once I had done that I looked in vain for an hour for a place to past the access token, and in the end decided to skip that step and press Start anyway. This worked and I can now see the smart plug on my dashboard.

Hopefully this will help other new users of Home Assistant Green.