Ungroup mirrored items?

Hello
How do you ungroup mirrored items?I need to ungroup the wheels.
I saw the youtube video which I set my shortcut the same and in the video the realtime was uncheck.
i tried it but nothing...I searched for ungroup but I think its called another name.

Tnx!

What do you mean by "Ungroup"?

Both items move together.
I need to edit them individually.
For instance in Moi3d If I select/highlight 2 items I can move/rotate/scale them.
If I select 2 items and give them a name...they will be grouped under that name.
In the object tree I can select both as one...but in 3d window I can select them as individual.

The items in Nvil were mirrored but I cannot figure out how to separate them lol.

I guess in Nvil3d is the parent/child behaviour.

Tnx!

Object mode > Common Commands n Tools > Split.