Board Thread:Naruto Gaiden/@comment-12509038-20150524202522/@comment-25632268-20150525185430

Mecha Naruto wrote: Did Sarada awaken her Sharingan in chapter 4 or before Gaiden.

For me it clearly looks like she just awakened it in. She was under strong emotions and we know that it is a requirement for awakening this eyes. Also, she didn't activated them during fight against Shin, and I'm sure she would if it was possible back then.