So I've been in the 'Naruto' fandom for ages, and honestly, the best spot for super specific pairings like Hinata x Sasuke tends to be on the actual fanfiction hubs. You're gonna want to head straight to Archive of Our Own and use their tag system. Filter for the Hyuuga Hinata/Uchiha Sasuke relationship tag, then add the 'Explicit' rating filter. Their search is really powerful for that.
Some folks also dig up older stuff on FanFiction.net, but the tagging over there is messier and the moderation stricter, so you gotta dig. I've found a few surprisingly good ones by searching 'Hinata Sasuke' and then sorting by reviews. You'll have to wade through a lot of gen or tame stuff though.
Honestly, the ship is pretty niche compared to the big ones like NaruSasu or SasuSaku, so the pickings can feel slim sometimes. Finding a well-written one that's also a lemon is like a little victory dance moment for me.