Where is Landro Longshot?

[Sniperorc-azgalor (Sniperorc)]

Update on the Dragonflight known issues tracker.

Known Issues – Dragonflight version 10.0.0 -- Updated October 27

Some NPCs who redeem codes from outside the game have been temporarily removed. They will return to their usual locations soon. The code redemption NPCs have returned.

The last sentence in there is the update: The NPCs have been returned.