If an uchiha hasn't had some traumatic event happen to them then they will not unlock sharingan
Actually, Sasuke activated his Sharingan after witnessing the death of his parents, but forgot.in order to activate the sharingan, you need to witness something horrible
/something that puts you close to death, in sasukes case he thought he nearly died in the hands of orochiamru in the chuinin exams so the sharingan activated
in order to activate the sharingan, you need to witness something horrible
/something that puts you close to death, in sasukes case he thought he nearly died in the hands of orochiamru in the chuinin exams so the sharingan activated