And with the way Ahsoka both starts and ends the episode with lightsaber badassery, any follow-up appearances from Rosario Dawson’s not-so-much-a-Jedi this season would either pale in comparison, or the creative team would need to go even bigger on the fight scenes and expositional mythos.
And that was indeed an extremely important role to fill, since Mando has been 85% clueless since first coming into contact with the bitty creature in Season 1.
Taking the most basic reading of that answer, one would infer that Ahsoka Tano’s role has been fulfilled within The Mandalorian’s narrative, at least as far as being the connective informational tissue between the Force-sensitive Baby Yoda and Mando.