Auto detection doesn't work, discovery component is missing

Hi, I’m a fresh user for HA and i’m trying to add some integrations in my system. But when I want to add something with the integration menu, there is no “auto detection” section at the top of this menu.
After some searches, I think I miss the discovery component in my system but I can’t find the way to add it.
Is there someboby that can explain me how to do this ?

Thanks,

Axel

If this is a new install, then the default_config entry loads the discovery component
This is thelist of things loaded by the default_config component

Plus can you explain more about auto-detection section at the top of the menu?

Thanks for your answer Adrian,

I’ve check my configuration.yalm and I confirm that default_config line is present

Here is a screenshot from my integration add menu, my problem is thant I can’t find where my system is auto-detecting “things to add”

anything auto discovered will give a notification where your name is on the lefthand side