According to the canon, Ahsoka is born in 36 BBY. These events take place in 9 ABY. As in the Star Wars universe the galactic calendar takes into account a year 0, Ahsoka should be 46 years old at the time of this episode.
Come forward. You're a Mandalorian?
The Mandalorian: Yes.
Morgan Elsbeth: I have a proposition that may interest you.
The Mandalorian: My price is high.
Morgan Elsbeth: This target is priceless. A Jedi plagues me. I want you to kill her.
The Mandalorian: That's a difficult task.
Morgan Elsbeth: One that you are well-suited for. The Jedi are the ancient...
Ahsoka Tano references Yoda as the only other member of the species that she has ever known. There was another Jedi Master named Yaddle that was also the same species as Yoda and Grogu. She served on the council just prior to the Clone Wars and briefly appeared in The Phantom Menace. In what is now known as the "Expanded Universe", Yaddle was killed sacrificing herself to save Obi-Wan Kenobi and his Padawan, Anakin Skywalker, four years before Ahsoka would have been named Anakin's Padawan apprentice. In the revised "Canon Universe" that is considered the factual history of Star Wars, it is unknown what happened to Yaddle after she stepped down from the council following the Battle of Naboo, though it is believed she spent the majority of her time in the archives following her stepping down and that she was likely killed before or during the Order 66 Jedi purge. It is reasonable to assume that Ahsoka may never have had the opportunity to meet Master Yaddle.
The concept art seen during the end credits, in order of appearance: