An interesting game that Nintendo made early on in their mobile saga was Dragalia Lost [1], which was probably the most generous 'gatcha' [2] mobile game ever released.

It was so player-friendly, that it underperformed for much of it's 4 years, and ultimately shut down in November 2022.

It was unfortunate that mobile gaming is in the state that its in, but Nintendo had some good ideas in the mobile space.

[1] https://en.wikipedia.org/wiki/Dragalia_Lost

[2] https://en.wikipedia.org/wiki/Gacha_game