Because even if his solo shot was cut, the battlefield could have seen Thanos’ forces being killed by Yondu’s arrow.
As previously stated, the Avengers: Endgame conclusion featured countless characters, all involved in a complicated action sequence that is a visual masterpiece.
The iconic weapon leaves a red trail behind it, so the hardcore fans would have figured it out, and likely lost their minds.
But The Russo Brothers and their team(s) of visual affects artists may have missed a subtle opportunity to include Kraglin in the battle.