Omega is an enhanced clone in the TV series Star Wars: The Bad Batch. Omega spent her childhood on Kamino. After Palpatine rose to power, Omega met and eventually joined Clone Force 99 AKA the Bad Batch.
Actress Michelle Ang voiced Omega in The Bad Batch.
Learn more about Omega on her Wookieepedia page. And see a bit of Omega in action in the trailer for The Bad Batch.