If she appears anywhere in live action, it will be on Supergirl or Stargirl shows.
(Where a female is already the star, and Powergirl is not there to titillate the hero. Pun not intended.)
If on Supergirl, she’s there to show an alternate universe Kara, where’s she’s older and different.
If on Stargirl, she’s there as a younger JSA member, who Courtney could aspire to be.
I don’t foresee her on anything else. Not even the new Superman and Lois show.