Lol and people made fun of Sarada for not having Sasuke around to teach her Goukyaku no jutsu
He used a device to make lightning. Boruto only has fuuton, he does have a vanishing rasengan though, but the reason for that is probably tied to him learning gentle fist. (He did it unintentionally.)
I am not making fun,but just ask where is the point, that Sasuke try to train him? He cannot use lighting. Kohnohamaru taught him the rasengan, if I am not wrong? So what the hell could Sasuke teach him, he has no lighting release no dojutsu. So it would make more sense when his father train him sage mode and transfer him biju power.
Wait how does vanishing rasengan corelate to gentle fist