Can not find a collection where an instance linked from

Support Basics & Interface
1

I have a collection instance in blender file but I don’t have that collection where the object was linked from, also there is no way to know is it linked from another file or it is local.
Th chain icon is grey and no external path appears on orphan data etc

blender_2021-01-23_08-05-17
blender_2021-01-23_08-05-171920×1200 352 KB

It makes me crazy and sad =(((((

2

Can I see a screenshot of Outliner > Blender File > Current File > Collections ?

3

If I link to scene this collection it appears on viewport, so I think this is the only way to edit… but where is original mesh I got that instance from?