Cannot find the Supervisor tab

Configuration
1

Hi,
I’m fairly new to HA and I’m struggling to find the supervisor tab so I can install Portainer for instance.
I have installed HA on its own on a NUC.
Here’s some info about my HA installation:

HA
HA1148×838 64 KB

Many thanks in advance for your help!

2
3

Open your Home Assistant instance and show your Supervisor dashboard.

4

You can’t install portainer though. There is no longer an addon for it.