Kagbeni (or Kag) is found upstream on the Kali Gandaki, on the road/trail to Lo Manthang. ... You can't venture north of Kagbeni without an Upper Mustang permit, but you can explore the village and even trek back to Jomsom via the high west-bank route that takes you through the village of Phalyak (seven to eight hours).
https://youtu.be/nOY54E1Y8Qw