While we do know that Ahsoka and Luke are already familiar with one another, there hasn’t been anything confirming or hinting at the possibility that Luke would appear in a series that focuses on Ahsoka’s journey. After all, Ahsoka was one of the few Jedi who lived during the time of the Jedi Order and was actually the Padawan of Luke’s father. Meanwhile, Luke was more focused on building the foundations of his Jedi Order instead of inserting himself and his Jedi in the affairs of the New Republic.