The unity inspector of the Cinemachine TargetGroup has an inspector that has this:

It looks like a List that holds variables
How can I achieve this in my own game?

The unity inspector of the Cinemachine TargetGroup has an inspector that has this:

It looks like a List that holds variables
How can I achieve this in my own game?

It’s just a collection of a serializable class/struct with a custom inspector/property drawer.
They’re deep subjects so lots of learning ahead of you.
Thanks. I will definitely check that out.