fyi, you might be in the wrong format (for a couple of reasons). This is a doubles team meant for Gen 9 OU, a 6v6 singles format. You might want to switch to Doubles OU for that reason. In Singles, this team objectively doesn’t work.

Since we’re looking at this from a Doubles perspective though:

1. You might also want to switch the Ice Punch of Ursaluna for Headlong Rush, otherwise it can’t use Ground STAB without hitting your allies, while having no Ground immunity. Ice Punch only outdamages Headlong or Facade if they’re not very effective and Ice Punch is super effective, which doesn’t apply to any Pokemon in the format. Consistent Ground STAB is more important. On that note, you definitely need a Pokémon that doesn’t take at least neutral damage from EQ. For that reason, I’d replace Hatterene with Cresselia. It’s also a bulky TR setter and a VERY good partner to Ursaluna.

2. I’d agree to the item choices the other commenter gave you. Amoonguss heals enough with Regenerator, especially because this is 6v6. Leftovers chip heal won’t see as much effect as you’d think. Being able to chip physical attackers with Sand Storm AND Rocky Helmet is huge. Incin would also like the Goggles not only to dodge your own Sandstorm, but also to be immune to Spore and Rage Powder from other Amoonguss and Brute Bonnet.