I can't get [-- Find By - Selector --] of an element

When you click on an image in the Instagram app, the image is sometimes labeled “Just seen”, I’m looking for a way to identify which image has such a label!?

But no matter how much I search in “App Source” there is no “Find By - Selector” to get the element.

I checked both in Appium Inspector and uiautomatorviewer but I can’t find any way how to get “Just seen” element in “App Source” it looks like a ghost, there is no trace of it!

Can anyone help me!?