Ahsoka Tano made her debut in the 2008 animated film Star Wars: The Clone Wars. From then on, she featured as a regular on the subsequent animated series of the same name. Following the cancellation of that series, Ahsoka went on to significantly feature in the Star Wars Rebels animated series.
Star Wars: The Clone Wars was recently revived for one final season — which is currently in the midst of premiering on the Disney+ streaming service. The animated series recently reintroduced Ahsoka Tano — more on that here. Another Star Wars series that's exclusive to Disney+ is The Mandalorian.
Unlike the two aforementioned animated series, The Mandalorian is live-action. The series aired throughout November and December 2019 and was promptly renewed for a second season. According to recent, verified reports by the likes of /Film; Ahsoka Tano will make her live-action debut in The Mandalorian Season 2.
What's more, they've already cast her. In the second season of The Mandalorian, Ahsoka Tano will be played by Rosario Dawson (Briarpatch). This casting is particularly notable since Dawson herself, as well as many fans, have petitioned for her to play Ahsoka in live-action for a long while now. It seems they got what they were after.
Star Wars: The Clone Wars — The Final Season is now streaming on Disney+