Sure, there are. Fanfiction writers often get creative with crossovers. In some 'Dragon Ball Xenoverse Naruto' fanfics, you might see Naruto characters being trained in the Hyperbolic Time Chamber from Dragon Ball. Or perhaps a fusion of the two power - up systems, like Sage Mode combined with Super Saiyan forms. You can find these by exploring different fanfiction communities and platforms.
Yes, there are quite a few. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Dragon Ball Xenoverse Naruto' in their search bars, and you'll find a variety of stories. Some might focus on crossovers where characters from both universes interact in interesting ways, like Naruto characters learning ki techniques from Dragon Ball characters.