https://www.gamespot.com/articles/you-can-use-your-my-nintendo-gold-points-on-switch/1100-6456665/

My Nintendo members will soon be able to use some of their points on Switch games. Nintendo announced it is making some changes to the rewards program next month, which will most notably let players buy certain Switch titles with their Gold points.

Beginning in "early" March, My Nintendo members will be able to use their Gold points toward the purchase of select Switch games or DLC from the Eshop. Once the new system is in place, you'll be able to choose how many of your Gold points you wish to use toward the game on checkout and pay the remaining balance with your Eshop funds.