system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: The Last Airbender] Why did the Yuyan Archers never make a return?

The most successful attempt to capture the avatar in history was at the hands of the Yuyan archers. Without the Blue Spirit to save him, I'm not sure how Aang would have survived that prison. 

So given that the Fire Nation has this incredibly useful tool, why won't they use them to capture the Avatar?
gpt
Note that when General Zhao first asks for the Yuyan Archers, he's refused- it's deemed a vanity project. They're at war, and they need the archers in the war, not tracking down a single 12 year old with no better information then "probably somewhere in the earth kingdom". It's only when Zhao pulls rank that he's able to force them to do so.

With his death, it seems likely the archers were sent back to the front lines where they belong.