I don’t think Ashoka is returning to this galaxy. The lesson to Sabine was “destroy the map to prevent Thrawn from returning”. A lesson Ashoka might have to face herself in destroying the hyperspace ring. Preventing all of them from returning.
Imagine a blank canvas for Dave Filoni to create new Star Wars stories without the baggage of canon in the current galaxy. You have all the ingredients you would need.
In my mind, Thrawn has ascended to a position of power and built up his forces. Maybe already oppressing the people of that galaxy. With Baylan, Shin, and Morgan possibly bringing more of the Dark Side with them, the Force would need balance. Enter Ashoka, Ezra, and Sabine and a new galaxy of stories to create.
Maybe Ashoka is not dead in the Sequel Trilogies. Maybe Din, Grogu, and Bo-Katan bring the Mandalorians and others with them to Peridea somehow. Probably with the help of Hera and Jacen's connection with Ashoka through the force.