I adore A Short Hike, to the point that I've finished the uplifting, playful mountain ascent three times. When I tell this to people, one of the most common responses is: hey, you should play Lil Gator Game.
I have played Lil Gator Game, and yep: it's good, too. A similarly knockabout outdoor adventure with a cast of vibrant characters.
Now it's getting a new "game-sized" expansion called Lil Gator Game: In The Dark. Seemingly following on from the events of the original, In The Dark takes place in caves underneath the island you've explored so far.
There are new characters to meet and toys to play with, but even underground it seems like you'll be climbing and gliding just as before.
I suppose it makes sense, given the original took obvious influence from Breath Of The Wild, that this followup might take some influence from Tears Of The Kingdom - at least as far as an underground setting goes, anyway.