-
Lego Horizon Adventure? I hear they took out all the grim stuff and made it a kid-friendly eco advanture.
Luigi's Mansion 3 sounds like a safe bet, given the games you say they have liked.
Extra thought: World of Goo and the sequel? The full catalogue of Tomorrow Corporation games goes some dark places (like turning your kid into an assembly language programmer if you pick Human Resource Machine - and then there's "My Little Inferno") but the Goo games are kid friendly with a mild "Fungus the Bogeyman" hint in the atmosphere.
What Switch games are good for a 10 year old that has & likes Zelda (Skyward Sword, BOTW and TOTK) Minecraft, Fortnite, Smash Bros, and Lego Star Wars & Harry Potter?