Is Reiki only about aura cleansing, or does it go deeper into karmic healing too?

Name: Diya. DOB: 30 October 1993. POB: Kolkata, India. TOB: 9:05 AM.

I wanted to ask about Reiki, is it mostly about cleansing the aura, or does it work on deeper levels like karma, emotional wounds, or even past life energies?