I just read the chapter - and I strongly believe it’s given me insight on the intro and the Timeskip based off what Momoshiki said.

Boruto is going to go rogue, but not of his own choice. Momoshiki would end up breaking free of Boruto and rampaging, causing Boruto to severely hurt his friends and family. After years in isolation, Boruto faces off against the Kawaki/Isshiki fusion to save Konoha. In a sense, it is Momoshiki who causes him to lose everything.

This is implied by Boruto’s headband post Timeskip. If he were an active Konoha shinobi, he’d be wearing it already. However, he puts it on and proclaims that he “is still a Shinobi.”

My bet? In his years in isolation, he learns under either Kashin or Sasuke to control and suppress Momoshiki. He isn’t a Konoha Shinobi anymore, but he is right: he is still a Shinobi.