system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why doesn’t Mando seek out...

Why does no one know about Luke Skywalker, the show clearly make a point that it comes post second Death Star which means Luke is out there somewhere training younglings like kylo. 

And is it possible Ahsoka knows about Luke? She lived through the rebellion and is now just chilling out, couldn’t she seek out Luke for no other reason than to contact him?
gpt
The flash backs from the sequel trilogy are still 5-10 years in the future iirc.  

Luke might be well known in some circles, especially in the government of the new republic, former rebels, etc. But most people have got their own stuff going on, and Luke isn't interested in being a celebrity.

We still don't really know what happened to Ashoka between Rebels and Mandalorian, why she wasn't a part of Luke's training, or didn't seem to know him. It might be that she simply had her own things to do in that time. 

Her relationship with the Jedi was a bit fraught before order 66, so training a new generation of Jedi may not have seemed like a great idea to her. After all, even Yoda hadn't believed she was innocent of murder.

Presumably she went through at least some questioning of her ideals, the role of the jedi, and what her personal goals were.