Which games would you recommend to me for the 3ds or the Nintendo Switch so that are similar or just as cool as harvest moon my island paradise.
Try Stardew Valley. There's a switch version of this.
There are Harvest Moon parts for the 3DS and the Switch, but they are not good from the original developers and really not good at all.
Fortunately, the original developers created a similar game to Harvest Moon for the 3DS: Story of Seasons.
Story of Seasons - Trio of Towns is very good, as well as Harvest Moon - stories of two cities (of which there's a DS and a 3DS version, but the latter contains a bug, if you have a Suffolk sheep (the one with the black) Stroking the skin), the game crashes).
Thank you for your answers
