Non editable / not visible UI items in App studio. Where to find biding / event related to them?

I found out that some elements from UI are not editable via application studio.
As an example let’s take “Address Format” from Supplier details screen.
“New Line” link can’t be selected in application studio. I wasn’t able also to find it in MetaUI folder related to supplier.

On second screenshot you can see that you can also remove “Address Format” line, however ‘thrash’ icon is not visible at all in application studio. The screenshot was taken from regular application and not from developer/app-studio mode:

Developer mode is showing that either clicking “New Line” or “trash icon” is not triggering any action.
In that case how we can prevent user from clicking such “UI items”?
I don’t want to hide whole “Address Format”. User should be just not allowed to click “New Line” or “trash icon”. How this can be achieved?

This is one of those special, purpose-built controls that you can’t alter.
Best you can do is mark it as “Disabled”. The users will be able to see it, but not modify it.
You will, of course, need to set the address format yourself before doing this OR create a rule that makes it disabled except for an IT-based security group.