For in-game, there are far better sets. In competitive, Hawlucha uses setup because Grassy Seed+Grassy Surge Rillaboom+Unburden means it has a better chance of getting a SD/HC off. However, that only works in doubles. In-game, (I’m aware SWSH is very easy, so this doesn’t apply if you’re not absolutely garbage at the game) your opponents don’t have EVs, appropriate natures, etc. As a result setup both isn’t needed and puts a risk to your Hawlucha in the first place. I’d replace Hone Claws with a flying STAB like Acrobatics or Brave Bird. Stone Edge is okay, if you’re willing to sacrifice the accuracy. Also, did you mean Black Belt instead of Expert Belt? Expert Belt only boosts Flying Press if it’s super effective.
Basically, what I’d do with the set:
Hawlucha @ Black Belt
(Don’t worry about EVs or natures; all they do is add unnecessary stress and take away your time)
- Flying Press
- High Jump Kick / Brick Break
- Acrobatics / Brave Bird
- Stone Edge / X-Scissor / U-Turn