Here's What Dave Filoni Had to Say About Ahsoka Tano's Voice in The Rise of Skywalker

Just because Rey heard Ahsoka Tano’s voice mixed in with the voices of Jedi past, it doesn’t necessarily mean she’s dead.

from gizmodo http://www.gizmodo.co.uk/2020/02/heres-what-dave-filoni-had-to-say-about-ahsoka-tanos-voice-in-the-rise-of-skywalker/