Board Thread:Naruto Gaiden/@comment-26889013-20150814064323/@comment-6036561-20150814102144

I don't think Sakura's strength has become a Kekkai Genkai... it was not a jutsu from the beginning, but "just" chakra control. Likely Sarada "learned" it by watching her mom punching Shin (father): punch the enemy, release all your chakra... I don't think it should be difficult to catch the trick with the Sharingan