Naruto's world went from the fourth great ninja war to the Boruto events. The city has grown, there have been technological discoveries that also influenced ninja art, and then new variants and fighting techniques were born. Finally, the Otsutsuki complete the picture.
The intervention of these aliens was central to the plot of Boruto: Naruto the Next Generations when it all began with Naruto's arrival on earth and everything continues in her sign. Even if Isshiki Otsutsuki has been eliminated for the time being, this does not mean that the remnants of the karma in Code and Boruto are still alive. It was precisely these two who came to the fight in Boruto 63.
The protagonist began to use his own karma, as did the enemy of the Kara organization. However, the latter has a clear advantage and explains what the true essence of karma is. Power manages to strengthen and increase strength, speed and reflexes during a fight. Why does it happen lies in the origin of karma, which is precisely the code of Otsutsuki. is: they transfer all their knowledge and their centuries of fighting experience to their host.
The genetic code of the Otsutsuki thus overwrites that of the hostmaking it stronger. However, it is necessary to extract this power and it is not easy, which is why Code is so superior to Boruto right now.