Hypothetically if Sarada masters byakugou

[FemmeFatale]

Does it look like Sarada has a brother/sister ?

She has a mother and father. Uchiha eyes aren't special their brain is. Sakura can possibly take Sakura eyes and unlock the EMS, because Sakura still meets the qulifications, and Sarada still have the special chakra. And Sakura can just rengenerate new ones.