Yun Xi always held with the principle that if she could speak with actions, she shouldn't be babbling with her mouth.
Those three shots were enough to shut the mouths of those who had been questioning her capabilities.
But she had only done this to prove her worth in order to enter the operation. She wasn't trying to contend for commanding rights with Mu Feichi.
When it came to commanding the operation, she definitely wasn't as experienced at Mu Feichi.
Furthermore, this was actual combat fought with live rounds. A tiny bit of carelessness, mishap, or slipup could cause grave consequences. She wasn't going to use anyone else's life as a stepping stone for her training.
After the contest ended, Yun Xi stood silently behind Mu Feichi and listened to him discuss the operation plan in English with the other team members.