Perhaps The Stretchers is a good one, and personally speaking, I didn't like that the game requires single Joy-Cons for multiplayer. Brain Training is another good one, but not sure if the new Big Brain Academy game would've met the same fate despite not being released yet.
I would have suggested Soldam: Drop, Connect, Erase, but I noticed that it was on the 4th Playstation console, so it does not count even though it could've counted, since it was an early Switch game. Also, Sushi Strikers is a simultaneous Switch and 3DS game (similar to the first Dr. Mario game), so I wouldn't count it as a Switch exclusive even if it technically forgotten.
This Nintendo-developed exclusive is so forgotten that when suggesting possible titles for Nintendo Selects, this is often left out even though it technically has what it takes to be one, namely the fact that it sold very well (especially very early on).
Thank you for reading.