Sasuke has his entire clan murdered and was tortured by his brother.
His Brother was used by Konoha to kill his own clan...
Then Sasuke left Konoha and her mother to seek revenge as a result of his bad past.
Sarada doesn't need to know anything about Uchiha's massacre.
It's too complex to her.
Sasuke and Sakura would have a normal romance story without sasuke's traumas.
They will probably talk about the events in Part 1 and between 699 and 700
His Brother was used by Konoha to kill his own clan...
Then Sasuke left Konoha and her mother to seek revenge as a result of his bad past.
Sarada doesn't need to know anything about Uchiha's massacre.
It's too complex to her.
Sasuke and Sakura would have a normal romance story without sasuke's traumas.
They will probably talk about the events in Part 1 and between 699 and 700